NativeScript/apps/ui/src/bottom-navigation/issue-5470-page.xml

<Page xmlns="http://schemas.nativescript.org/tns.xsd" class="page">

    <ActionBar title="BottomNavigation issue 5470" icon="" class="action-bar">
    </ActionBar>

    <BottomNavigation automationText="tabNavigation" >
        <TabStrip>
            <TabStripItem title="Tab1"></TabStripItem>
            <TabStripItem title="Tab2"></TabStripItem>
        </TabStrip>

        <TabContentItem>
            <GridLayout rows="*, auto" columns="*">
                <StackLayout row="0" backgroundColor="lightblue"></StackLayout>
                <StackLayout row="1" backgroundColor="green" height="50"></StackLayout>
            </GridLayout>
        </TabContentItem>

        <TabContentItem>
            <GridLayout rows="*, auto" columns="*">
                <StackLayout row="0" backgroundColor="lightblue"></StackLayout>
                <StackLayout row="1" backgroundColor="red" height="50"></StackLayout>
            </GridLayout>
        </TabContentItem>
    </BottomNavigation>

</Page>