iOS - BlazePose sample works for only for 1 device orientation + tracking breaks down at sides

Environment:

OS/OS Version: iOS 14 (iPad + iPhone)
Source Version: master

Describe the bug This bug report is for iOS, but it may apply to Android or any device whose camera's orientation can be changed.

BlazePose sample only works in 1 specific orientation on the iPad and iPhone -- If iOS Rotation Lock is Off, it works in landscape reverse (with the back camera on the right side). -- The working orientation can differ if iOS Rotation Lock is On. -- In the other 3 orientations, the pose flickers rapidly and the debug image view shows the image rapidly flipping upside-down.
Even when using the working orientation, the tracking breaks down as the tracked user moves to the side and goes outside of the red debug box (DrawCropMatrix).
If the user sets the iOS Rotation Lock to On, the Test Webcam Rotation scene does not work. -- Rotation remains at 0 regardless of device orientation.

Expected behaviour

BlazePose sample should work regardless of device orientation
BlazePose + Test Webcam Rotation sample should work for all 4 orientations even if the iOS Rotation Lock setting is On

Additional context

Note that the Test Webcam Rotation scene is behaving correctly with Rotation Lock: Off -- On iOS, the raw input is flipped vertically. The trimmed and resized inputs look correct for all device orientations.

Workaround This workaround can be used to:

Get the sample to work on Landscape (back camera on the left side)
Fix the tracking breakdown as the tracked user moves to the side

Comment out these lines in Invoke() and InvokeAsync() methods in PoseLandmarkDetect.cs

https://github.com/asus4/tf-lite-unity-sample/blob/928157b3ce81945fb53722099b22cf04bf3fcbfb/Assets/Samples/BlazePose/PoseLandmarkDetect.cs#L107-L109

https://github.com/asus4/tf-lite-unity-sample/blob/928157b3ce81945fb53722099b22cf04bf3fcbfb/Assets/Samples/BlazePose/PoseLandmarkDetect.cs#L133-L135

            //var resizeOptions = (inputTex is WebCamTexture)
            //    ? base.resizeOptions.GetModifedForWebcam((WebCamTexture)inputTex)
            //    : base.resizeOptions;

asus4 / tf-lite-unity-sample

iOS - BlazePose sample works for only for 1 device orientation + tracking breaks down at sides #157