Steps to reproduce:
1. Open the attached user's project "PassthroughMatrixBug.zip"
2. Open the "Scenes/SampleScene" Scene
3. Make sure the OpenXR provider is enabled with "Initialize XR on Startup" checked (Edit > Project Settings > XR Plug-in Management)
4. Enable the OpenXR "Mock Runtime" Feature in the OpenXR Settings
5. Select the "XRRig/Camera Offset/XR Camera/PassThroughCamera" GameObject and make sure its Camera -> Output -> Target Eye is set to "None"
6. Enter the Play Mode
7. Observe the Game view
8. Resize the Game view vertically and horizontally
Actual result: The Camera's projection matrix is not corrected for the window aspect ratio - the image is stretched vertically and the horizontal width stays fixed when resizing (See attached Results.png)
Expected result: The Camera's projection matrix is corrected for the window aspect ratio
Reproducible with: 6000.0.83f1, 6000.3.24f1, 6000.6.0a7 (240d06e2411b), 6000.6.0f1, 6000.7.0b1, 7000.0.0a1
Not reproducible with: 6000.6.0a6 (5c9528587bc8)
Testing Environment: Windows 11
Not reproducible on: no other environment tested
Notes:
-When running via Meta Link, the issue is not observable on the HMD, so a Meta Quest headset is not required for the reproduction of the issue