UserSceneTexture not working in Virtual Reality

User reports that UserSceneTextures used in Post Process Materials are only correctly rendered inside the left eye in VR.

Steps to Reproduce

1. Create a VR Template project.
2. Create a post process material that output a UserSceneTexture.
3. Create a post process material that use the created UserSceneTexture.
4. Set them inside the VR Template level.
5. Play in VR.

The UserSceneTexture is only render correctly in the left eye.