Reproduction steps:
1. Open the user's attached project "SkyboxShaderVR.zip"
2. Make sure that OpenXR is set as the XR plugin and Single Pass instancing is enabled
3. Switch to Standalone platform and Build for Quest 2
4. Move the headset around to observe the glitching

Expected result: Custom Shader Graph shader does not cause duplicating view in Build when using Single Pass instancing
Actual result: Custom Shader Graph shader does causes duplicating view in Build when using Single Pass instancing

Reproduces on: OpenXR 1.3.1 - 1.4.2 (2020.3.34f1, 2021.3.4f1, 2022.1.1f1, 2022.1.0a16)
Could not test on 2019.4.39f1 due to OpenXR not being available

Reproduces with these devices:
N/A, Oculus (Quest 2), Android 10, CPU: Snapdragon XR2, GPU: Adreno (TM) 650

Notes:
-A workaround that works for Vive Index is: convert the Shadergraph to a regular .shader HLSL code file by copying the Shadergraph code to a new .shader file. Then manually add ZClip False to the shader code. This however does not work for Quest
-Issue only reproduces with Single Pass instancing and OpenXR
-Application does not launch via Oculus Link when using OpenGLES3
-Direct3D11 and Vulkan cause different graphical glitches (attached and named respectively Direct3D11.mp4 and Vulkan.mp4)