Jpeg Rotation always 90 degrees in on screen image

Hi,

I'm posting this in Xamarin.Android as I'm not sure if it's related to the camera2 api or the xamarin forms .

Basically, I have the camera preview working in my SurfaceView, but when I create a still image capture request using an ImageReader and display it in an xamarin.forms element by saving the output of the ImageReader to a file and setting the Image.Source property to it, it is always 90 degrees to the orientation of the screen.

As an example of the output, here is what I get (orange is the camera preview, green is the resulting image from the still capture request):

Here is the xaml for the display:

<AbsoluteLayout IsVisible="{Binding CameraMode}"
                         AbsoluteLayout.LayoutBounds="0,0,1,1"
                         AbsoluteLayout.LayoutFlags="All"
                         Margin="0"
                         Padding="0">

            <controls:CameraPreview x:Name="CameraPreview"
                                    AbsoluteLayout.LayoutBounds="0,0,1,1"
                                    AbsoluteLayout.LayoutFlags="All" />

             <Image Source="{Binding PreviewImage}" Aspect="AspectFill" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All" Opacity="0.8" />

            <Button Text="Timer" 
                    BorderRadius="20"
                    BackgroundColor="{StaticResource PrimaryLight}"
                    AbsoluteLayout.LayoutBounds="0, 1.0, -1, -1"
                    AbsoluteLayout.LayoutFlags="PositionProportional"
                    Clicked="TimerButton_Clicked" />

            <Button Text="Capture" 
                    BorderRadius="20"
                    AbsoluteLayout.LayoutBounds="0.5, 1.0, -1, -1"
                    AbsoluteLayout.LayoutFlags="PositionProportional"
                    Clicked="CaptureButton_Clicked"/>

            <Button Text="Switch" 
                    BorderRadius="20"
                    BackgroundColor="{StaticResource PrimaryLight}"
                    AbsoluteLayout.LayoutBounds="1, 1.0, -1, -1"
                    AbsoluteLayout.LayoutFlags="PositionProportional"
                    Clicked="SwitchButton_Clicked"/>
        </AbsoluteLayout>

I know that the jpeg is rotated the correct way as I can save it to the gallery and open it there and I indeed see the photo upright. So I know that I'm setting the JpegRotation correctly when building the capture request. I've attached the code that does the whole preview / capture request here for you to see.

Any ideas are welcome as I've been at this for weeks now

Thanks,
Nick