diff --git a/lib/src/rive_core/animation/state_transition.dart b/lib/src/rive_core/animation/state_transition.dart
index 077d7c7..6ff0b02 100644
--- a/lib/src/rive_core/animation/state_transition.dart
+++ b/lib/src/rive_core/animation/state_transition.dart
@@ -42,16 +42,15 @@ class StateTransition extends StateTransitionBase {
     }
   }
 
-  double exitTimeSeconds(LayerState stateFrom) {
-    if (exitTime == 0) {
-      return 0;
-    }
+  double exitTimeSeconds(LayerState stateFrom, {bool absolute = false}) {
     if ((flags & StateTransitionFlags.exitTimeIsPercentage) != 0) {
       var animationDuration = 0.0;
+      var start = 0.0;
       if (stateFrom is AnimationState) {
+        start = absolute ? stateFrom.animation?.startSeconds ?? 0 : 0;
         animationDuration = stateFrom.animation?.durationSeconds ?? 0;
       }
-      return exitTime / 100 * animationDuration;
+      return start + exitTime / 100 * animationDuration;
     } else {
       return exitTime / 1000;
     }
diff --git a/lib/src/rive_core/bones/bone.dart b/lib/src/rive_core/bones/bone.dart
index 12d2a3d..8dd6359 100644
--- a/lib/src/rive_core/bones/bone.dart
+++ b/lib/src/rive_core/bones/bone.dart
@@ -46,4 +46,9 @@ class Bone extends BoneBase {
   set y(double value) {
     throw UnsupportedError('not expected to set y on a bone.');
   }
+
+  @override
+  bool validate() {
+    return super.validate() && (coreType != BoneBase.typeKey || parent is Bone);
+  }
 }
diff --git a/lib/src/rive_core/state_machine_controller.dart b/lib/src/rive_core/state_machine_controller.dart
index b395739..bea3f0c 100644
--- a/lib/src/rive_core/state_machine_controller.dart
+++ b/lib/src/rive_core/state_machine_controller.dart
@@ -21,7 +21,7 @@ class LayerController {
   LayerController(this.layer) {
     _changeState(layer.entryState);
   }
-  bool _changeState(LayerState? state) {
+  bool _changeState(LayerState? state, {StateTransition? transition}) {
     if (state == _currentState) {
       return false;
     }
@@ -53,8 +53,8 @@ class LayerController {
       }
     }
     for (int i = 0; updateState(inputValues); i++) {
+      machineController.advanceInputs();
       if (i == 100) {
-        machineController.advanceInputs();
         print('StateMachineController.apply exceeded max iterations.');
         return false;
       }
@@ -109,13 +109,14 @@ class LayerController {
           }
         }
       }
-      if (valid && _changeState(transition.stateTo)) {
+      if (valid && _changeState(transition.stateTo, transition: transition)) {
         _transition = transition;
         _stateFrom = stateFrom;
         if (transition.pauseOnExit &&
             transition.enableExitTime &&
             _animationInstance != null) {
-          _animationInstance!.time = transition.exitTimeSeconds(stateFrom);
+          _animationInstance!.time =
+              transition.exitTimeSeconds(stateFrom, absolute: true);
         }
         if (_mix != 0) {
           _holdAnimationFrom = transition.pauseOnExit;
@@ -160,6 +161,7 @@ class StateMachineController extends RiveAnimationController<CoreContext> {
     for (final layer in stateMachine.layers) {
       layerControllers.add(LayerController(layer));
     }
+    advanceInputs();
     return super.init(core);
   }