Application splash screen has no stabilisation

[WikkidEdd]

Describe the bug

When you start up an application the splash screen shows while the app is loading. During this period if you move your head up and down the splash screen shakes like content when it doesn't have stabilization enabled. This seems to have been introduced when upgrading from Unity 2019 to Unity 2020 and seems to occur on both WMR XR Plugin and OpenXR.

To reproduce

Steps to reproduce the behavior:

1. Clone this git repo
2. Open Unity project
3. Switch to UWP build platform
4. Build application
5. Switch solution config to Release and ARM64
6. Build and Start the application
7. Wait until splash screen appears and then move your head around
8. Observe unstable splash screen

Expected behavior

The splash screen should remain stable when moving your head.

Your setup (please complete the following information)

• Unity Version 2020.3.19
• Unity OpenXR Package 1.2.8
• Mixed Reality OpenXR Package 1.0.3
• Holographic OS 20348.1018
• OpenXR Runtime Version 107.2108.5003.0

Target platform (please complete the following information)

• HoloLens 2

Additional context

[yl-msft]

This seems to be an issue from Unity's side of the openxr plugin. I will report this to our Unity friends and see if we can find solutions or fixes for you. Will ping back when I have more details.