diff --git a/CHANGELOG.md b/CHANGELOG.md
index d844ad4c39..b53371022a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,20 @@
+## [4.11.2](https://github.com/ionic-team/ionic/compare/v4.11.1...v4.11.2) (2019-10-21)
+
+
+### Bug Fixes
+
+* **animations:** ensure all elements are cleaned up when calling .destroy() ([#19654](https://github.com/ionic-team/ionic/issues/19654)) ([d97e167](https://github.com/ionic-team/ionic/commit/d97e167))
+* **header:** collapsible header works in tabs ([#19658](https://github.com/ionic-team/ionic/issues/19658)) ([4853909](https://github.com/ionic-team/ionic/commit/4853909)), closes [#19640](https://github.com/ionic-team/ionic/issues/19640)
+* **ios:** hide leaving view after nav transition to avoid flicker ([#19691](https://github.com/ionic-team/ionic/issues/19691)) ([70e0562](https://github.com/ionic-team/ionic/commit/70e0562)), closes [#19674](https://github.com/ionic-team/ionic/issues/19674)
+* **menu:** clamp out of bounds swipe value ([#19684](https://github.com/ionic-team/ionic/issues/19684)) ([1535e95](https://github.com/ionic-team/ionic/commit/1535e95)), closes [#18927](https://github.com/ionic-team/ionic/issues/18927)
+* **react:** add IonPicker as controller component, fixes [#19620](https://github.com/ionic-team/ionic/issues/19620) ([#19643](https://github.com/ionic-team/ionic/issues/19643)) ([ed98d9e](https://github.com/ionic-team/ionic/commit/ed98d9e))
+* **react:** adding change events to IonTabs, fixes [#19665](https://github.com/ionic-team/ionic/issues/19665) ([#19711](https://github.com/ionic-team/ionic/issues/19711)) ([b7baf24](https://github.com/ionic-team/ionic/commit/b7baf24))
+* **react:** adding HashRouter to available ion routers, fixes [#19621](https://github.com/ionic-team/ionic/issues/19621) ([#19683](https://github.com/ionic-team/ionic/issues/19683)) ([fcdbb3c](https://github.com/ionic-team/ionic/commit/fcdbb3c))
+* **react:** pages no longer hidden when navigating between tabs, fixes [#19646](https://github.com/ionic-team/ionic/issues/19646) ([#19647](https://github.com/ionic-team/ionic/issues/19647)) ([8776556](https://github.com/ionic-team/ionic/commit/8776556))
+* **react:** ensure views are removed from DOM after navigating back, fixes [#19701](https://github.com/ionic-team/ionic/issues/19701) ([#19712](https://github.com/ionic-team/ionic/issues/19712)) ([ee21d3a](https://github.com/ionic-team/ionic/commit/ee21d3a))
+
+
+
 # [5.0.0-beta.0](https://github.com/ionic-team/ionic/compare/v4.11.1...v5.0.0-beta.0) (2019-10-15)
 
 
diff --git a/packages/react-router/src/ReactRouter/IonReactHashRouter.tsx b/packages/react-router/src/ReactRouter/IonReactHashRouter.tsx
new file mode 100644
index 0000000000..a7272bf468
--- /dev/null
+++ b/packages/react-router/src/ReactRouter/IonReactHashRouter.tsx
@@ -0,0 +1,15 @@
+import React from 'react';
+import { HashRouter, HashRouterProps } from 'react-router-dom';
+
+import { RouteManagerWithRouter } from './Router';
+
+export class IonReactHashRouter extends React.Component<HashRouterProps> {
+  render() {
+    const { children, ...props } = this.props;
+    return (
+      <HashRouter {...props}>
+        <RouteManagerWithRouter>{children}</RouteManagerWithRouter>
+      </HashRouter>
+    );
+  }
+}
diff --git a/packages/react-router/src/ReactRouter/IonReactRouter.tsx b/packages/react-router/src/ReactRouter/IonReactRouter.tsx
new file mode 100644
index 0000000000..aba729b6a3
--- /dev/null
+++ b/packages/react-router/src/ReactRouter/IonReactRouter.tsx
@@ -0,0 +1,15 @@
+import React from 'react';
+import { BrowserRouter, BrowserRouterProps } from 'react-router-dom';
+
+import { RouteManagerWithRouter } from './Router';
+
+export class IonReactRouter extends React.Component<BrowserRouterProps> {
+  render() {
+    const { children, ...props } = this.props;
+    return (
+      <BrowserRouter {...props}>
+        <RouteManagerWithRouter>{children}</RouteManagerWithRouter>
+      </BrowserRouter>
+    );
+  }
+}
diff --git a/packages/react-router/src/ReactRouter/NavManager.tsx b/packages/react-router/src/ReactRouter/NavManager.tsx
index 2e3183c2a0..1423090fdf 100644
--- a/packages/react-router/src/ReactRouter/NavManager.tsx
+++ b/packages/react-router/src/ReactRouter/NavManager.tsx
@@ -15,6 +15,7 @@ interface NavManagerProps extends RouteComponentProps {
   findViewInfoByLocation: (location: HistoryLocation) => { view?: ViewItem, viewStack?: ViewStack };
   findViewInfoById: (id: string) => { view?: ViewItem, viewStack?: ViewStack };
   getActiveIonPage: () => { view?: ViewItem, viewStack?: ViewStack };
+  onNavigate: (type: 'push' | 'replace', path: string, state?: any) => void;
 }
 
 export class NavManager extends React.Component<NavManagerProps, NavContextState> {
@@ -27,8 +28,6 @@ export class NavManager extends React.Component<NavManagerProps, NavContextState
     this.state = {
       goBack: this.goBack.bind(this),
       hasIonicRouter: () => true,
-      getHistory: this.getHistory.bind(this),
-      getLocation: this.getLocation.bind(this),
       navigate: this.navigate.bind(this),
       getStackManager: this.getStackManager.bind(this),
       getPageManager: this.getPageManager.bind(this),
@@ -66,36 +65,28 @@ export class NavManager extends React.Component<NavManagerProps, NavContextState
       if (enteringView) {
         const lastLocation = this.locationHistory.findLastLocation(enteringView.routeData.match.url);
         if (lastLocation) {
-          this.props.history.replace(lastLocation.pathname + lastLocation.search, { direction: 'back' });
+          this.props.onNavigate('replace', lastLocation.pathname + lastLocation.search, 'back');
         } else {
-          this.props.history.replace(enteringView.routeData.match.url, { direction: 'back' });
+          this.props.onNavigate('replace', enteringView.routeData.match.url, 'back');
         }
       } else {
         if (defaultHref) {
-          this.props.history.replace(defaultHref, { direction: 'back' });
+          this.props.onNavigate('replace', defaultHref, 'back');
         }
       }
     } else {
       if (defaultHref) {
-        this.props.history.replace(defaultHref, { direction: 'back' });
+        this.props.onNavigate('replace', defaultHref, 'back');
       }
     }
   }
 
-  getHistory() {
-    return this.props.history as any;
-  }
-
-  getLocation() {
-    return this.props.location as any;
-  }
-
   navigate(path: string, direction?: RouterDirection | 'none') {
-    this.props.history.push(path, { direction });
+    this.props.onNavigate('push', path, direction);
   }
 
-  tabNavigate(url: string) {
-    this.props.history.replace(url, { direction: 'back' });
+  tabNavigate(path: string) {
+    this.props.onNavigate('replace', path, 'back');
   }
 
   getPageManager() {
diff --git a/packages/react-router/src/ReactRouter/Router.tsx b/packages/react-router/src/ReactRouter/Router.tsx
index e93d5f7ba9..b0842b8476 100644
--- a/packages/react-router/src/ReactRouter/Router.tsx
+++ b/packages/react-router/src/ReactRouter/Router.tsx
@@ -2,7 +2,7 @@ import { NavDirection } from '@ionic/core';
 import { RouterDirection } from '@ionic/react';
 import { Action as HistoryAction, Location as HistoryLocation, UnregisterCallback } from 'history';
 import React from 'react';
-import { BrowserRouter, BrowserRouterProps, RouteComponentProps, matchPath, withRouter } from 'react-router-dom';
+import { RouteComponentProps, matchPath, withRouter } from 'react-router-dom';
 
 import { generateId } from '../utils';
 
@@ -20,10 +20,12 @@ interface RouteManagerState extends RouteManagerContextState {
 class RouteManager extends React.Component<RouteComponentProps, RouteManagerState> {
   listenUnregisterCallback: UnregisterCallback | undefined;
   activeIonPageId?: string;
+  currentDirection?: RouterDirection;
 
   constructor(props: RouteComponentProps) {
     super(props);
     this.listenUnregisterCallback = this.props.history.listen(this.historyChange.bind(this));
+    this.handleNavigate = this.handleNavigate.bind(this);
     this.state = {
       viewStacks: new ViewStacks(),
       hideView: this.hideView.bind(this),
@@ -41,6 +43,12 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
     }
   }
 
+  componentWillUnmount() {
+    if (this.listenUnregisterCallback) {
+      this.listenUnregisterCallback();
+    }
+  }
+
   hideView(viewId: string) {
     const viewStacks = Object.assign(new ViewStacks(), this.state.viewStacks);
     const { view } = viewStacks.findViewInfoById(viewId);
@@ -57,6 +65,8 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
   }
 
   historyChange(location: HistoryLocation, action: HistoryAction) {
+    location.state = location.state || { direction: this.currentDirection };
+    this.currentDirection = undefined;
     this.setState({
       location,
       action
@@ -65,7 +75,7 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
 
   setActiveView(location: HistoryLocation, action: HistoryAction) {
     const viewStacks = Object.assign(new ViewStacks(), this.state.viewStacks);
-    let direction: RouterDirection = location.state && location.state.direction || 'forward';
+    let direction: RouterDirection = (location.state && location.state.direction) || 'forward';
     let leavingView: ViewItem | undefined;
     const viewStackKeys = viewStacks.getKeys();
 
@@ -93,17 +103,16 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
               enteringView.prevId = enteringView.prevId || leavingView.id;
             } else {
               direction = direction || 'back';
-              leavingView.mount = false;
             }
-          } else if (action === 'REPLACE') {
-            leavingView.mount = false;
           }
         }
+        this.removeOrphanedViews(enteringView, enteringViewStack);
       } else {
         enteringView.show = true;
         enteringView.mount = true;
         enteringView.routeData.match = match!;
       }
+
     });
 
     if (leavingView) {
@@ -120,7 +129,6 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
       if (enteringView && viewStack) {
         const enteringEl = enteringView.ionPageElement ? enteringView.ionPageElement : undefined;
         const leavingEl = leavingView && leavingView.ionPageElement ? leavingView.ionPageElement : undefined;
-
         if (enteringEl) {
           // Don't animate from an empty view
           const navDirection = leavingEl && leavingEl.innerHTML === '' ? undefined : direction === 'none' ? undefined : direction;
@@ -137,10 +145,20 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
     });
   }
 
-  componentWillUnmount() {
-    if (this.listenUnregisterCallback) {
-      this.listenUnregisterCallback();
-    }
+  removeOrphanedViews(view: ViewItem, viewStack: ViewStack) {
+    const viewsToRemove = viewStack.views.filter(v => v.prevId === view.id);
+    viewsToRemove.forEach(v => {
+      this.removeOrphanedViews(v, viewStack);
+      // If view is not currently visible, go ahead and remove it from DOM
+      if (v.ionPageElement!.classList.contains('ion-page-hidden')) {
+        v.show = false;
+        v.ionPageElement = undefined;
+        v.isIonRoute = false;
+        v.prevId = undefined;
+        v.key = generateId();
+      }
+      v.mount = false;
+    });
   }
 
   async setupIonRouter(id: string, children: any, routerOutlet: HTMLIonRouterOutletElement) {
@@ -266,11 +284,21 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
     }
   }
 
+  handleNavigate(type: 'push' | 'replace', path: string, direction?: RouterDirection) {
+    this.currentDirection = direction;
+    if (type === 'push') {
+      this.props.history.push(path);
+    } else {
+      this.props.history.replace(path);
+    }
+  }
+
   render() {
     return (
       <RouteManagerContext.Provider value={this.state}>
         <NavManager
           {...this.props}
+          onNavigate={this.handleNavigate}
           findViewInfoById={(id: string) => this.state.viewStacks.findViewInfoById(id)}
           findViewInfoByLocation={(location: HistoryLocation) => this.state.viewStacks.findViewInfoByLocation(location)}
           getActiveIonPage={() => this.state.viewStacks.findViewInfoById(this.activeIonPageId)}
@@ -282,16 +310,5 @@ class RouteManager extends React.Component<RouteComponentProps, RouteManagerStat
   }
 }
 
-const RouteManagerWithRouter = withRouter(RouteManager);
+export const RouteManagerWithRouter = withRouter(RouteManager);
 RouteManagerWithRouter.displayName = 'RouteManager';
-
-export class IonReactRouter extends React.Component<BrowserRouterProps> {
-  render() {
-    const { children, ...props } = this.props;
-    return (
-      <BrowserRouter {...props}>
-        <RouteManagerWithRouter>{children}</RouteManagerWithRouter>
-      </BrowserRouter>
-    );
-  }
-}
diff --git a/packages/react-router/src/ReactRouter/ViewStacks.ts b/packages/react-router/src/ReactRouter/ViewStacks.ts
index b27aaa0386..660baa87c5 100644
--- a/packages/react-router/src/ReactRouter/ViewStacks.ts
+++ b/packages/react-router/src/ReactRouter/ViewStacks.ts
@@ -85,16 +85,4 @@ export class ViewStacks {
     return { view, viewStack };
   }
 
-  setHiddenViews() {
-    const keys = this.getKeys();
-    keys.forEach(key => {
-      const viewStack = this.viewStacks[key];
-      viewStack!.views.forEach(view => {
-        if (!view.routeData.match && !view.isIonRoute) {
-          view.show = false;
-          view.mount = false;
-        }
-      });
-    });
-  }
 }
diff --git a/packages/react-router/src/ReactRouter/index.ts b/packages/react-router/src/ReactRouter/index.ts
index f36dd64359..6e8cbe6211 100644
--- a/packages/react-router/src/ReactRouter/index.ts
+++ b/packages/react-router/src/ReactRouter/index.ts
@@ -1,2 +1,2 @@
-
-export { IonReactRouter } from './Router';
+export { IonReactRouter } from './IonReactRouter';
+export { IonReactHashRouter } from './IonReactHashRouter';
diff --git a/packages/react/src/components/navigation/IonTabBar.tsx b/packages/react/src/components/navigation/IonTabBar.tsx
index 9b97707746..fb656acfd0 100644
--- a/packages/react/src/components/navigation/IonTabBar.tsx
+++ b/packages/react/src/components/navigation/IonTabBar.tsx
@@ -6,6 +6,8 @@ import { IonTabBarInner } from '../inner-proxies';
 import { IonTabButton } from '../proxies';
 
 type Props = LocalJSX.IonTabBar & {
+  onIonTabsDidChange?: (event: CustomEvent<{ tab: string }>) => void;
+  onIonTabsWillChange?: (event: CustomEvent<{ tab: string }>) => void;
   currentPath?: string;
   slot?: 'bottom' | 'top';
 };
@@ -75,6 +77,12 @@ const IonTabBarUnwrapped = /*@__PURE__*/(() => class extends React.Component<Pro
         this.context.navigate(originalHref, 'back');
       }
     } else {
+      if (this.props.onIonTabsWillChange) {
+        this.props.onIonTabsWillChange(new CustomEvent('ionTabWillChange', { detail: { tab: e.detail.tab } }));
+      }
+      if (this.props.onIonTabsDidChange) {
+        this.props.onIonTabsDidChange(new CustomEvent('ionTabDidChange', { detail: { tab: e.detail.tab } }));
+      }
       this.context.navigate(this.state.tabs[e.detail.tab].currentHref, 'none');
     }
   }
diff --git a/packages/react/src/components/navigation/IonTabs.tsx b/packages/react/src/components/navigation/IonTabs.tsx
index 45204cca60..8b155b0869 100644
--- a/packages/react/src/components/navigation/IonTabs.tsx
+++ b/packages/react/src/components/navigation/IonTabs.tsx
@@ -1,3 +1,4 @@
+import { JSX as LocalJSX } from '@ionic/core';
 import React from 'react';
 
 import { NavContext } from '../../contexts/NavContext';
@@ -5,7 +6,7 @@ import { IonRouterOutlet } from '../IonRouterOutlet';
 
 import { IonTabBar } from './IonTabBar';
 
-interface Props {
+interface Props extends LocalJSX.IonTabs {
   children: React.ReactNode;
 }
 
@@ -28,7 +29,7 @@ const tabsInner: React.CSSProperties = {
   contain: 'layout size style'
 };
 
-export const IonTabs = /*@__PURE__*/(() => class extends React.Component<Props> {
+export class IonTabs extends React.Component<Props> {
   context!: React.ContextType<typeof NavContext>;
   routerOutletRef: React.Ref<HTMLIonRouterOutletElement> = React.createRef();
 
@@ -38,7 +39,7 @@ export const IonTabs = /*@__PURE__*/(() => class extends React.Component<Props>
 
   render() {
     let outlet: React.ReactElement<{}> | undefined;
-    let tabBar: React.ReactElement<{ slot: 'bottom' | 'top' }> | undefined;
+    let tabBar: React.ReactElement | undefined;
 
     React.Children.forEach(this.props.children, (child: any) => {
       if (child == null || typeof child !== 'object' || !child.hasOwnProperty('type')) {
@@ -48,7 +49,8 @@ export const IonTabs = /*@__PURE__*/(() => class extends React.Component<Props>
         outlet = child;
       }
       if (child.type === IonTabBar) {
-        tabBar = child;
+        const { onIonTabsDidChange, onIonTabsWillChange } = this.props;
+        tabBar = React.cloneElement(child, { onIonTabsDidChange, onIonTabsWillChange });
       }
     });
 
@@ -71,11 +73,7 @@ export const IonTabs = /*@__PURE__*/(() => class extends React.Component<Props>
     );
   }
 
-  static get displayName() {
-    return 'IonTabs';
-  }
-
   static get contextType() {
     return NavContext;
   }
-})();
+}
diff --git a/packages/react/src/contexts/NavContext.ts b/packages/react/src/contexts/NavContext.ts
index 8bc1873187..cafd475aa4 100644
--- a/packages/react/src/contexts/NavContext.ts
+++ b/packages/react/src/contexts/NavContext.ts
@@ -2,8 +2,6 @@ import { RouterDirection } from '@ionic/core';
 import React from 'react';
 
 export interface NavContextState {
-  getHistory: () => History;
-  getLocation: () => Location;
   getPageManager: () => any;
   getStackManager: () => any;
   goBack: (defaultHref?: string) => void;
@@ -15,8 +13,6 @@ export interface NavContextState {
 }
 
 export const NavContext = /*@__PURE__*/React.createContext<NavContextState>({
-  getHistory: () => window.history,
-  getLocation: () => window.location,
   getPageManager: () => undefined,
   getStackManager: () => undefined,
   goBack: (defaultHref?: string) => {