Clicking TextInput Slides Elements Up Off Screen Permanently

While testing an interaction in portrait mode I found a strange layout bug with the following setup causing the buttons and textinputs to slide up off the screen as I click on/off the text inputs, taking the second InputText and Buttons off the top of the screen after a few clicks on and off.

This bug happens whenever there are any elements extending off the bottom of the screen, if I make the buttons short enough that they remain on screen the inputs stay in place.

This isn’t a temporary move to get out of the keyboards way, this is a permanent move upwards each click, with more move happening each click depending on how far the buttons are extending off the bottom of the screen.

<App Theme="Basic">
    <Grid Rows="1,1">
        <StackPanel Alignment="VerticalCenter">
            <Text>Click on and off the textinput fields</Text>

        <StackPanel Alignment="VerticalCenter" >
            <TextInput PlaceholderText="Click Here"/>
            <TextInput PlaceholderText="And Here"/>

            <Button Text="If these extend off screen" Height="110" />
            <Button Text="Everything slides upwards" Height="110" />

Video Demonstrating The Bug