Reproduction steps:
1. Download and open the attached "URP-iPhoneXRiOS13-VertexShader-TextureIssues_v002.zip" project
2. Build and deploy the project to iPhone XR
3. Observe the devices screen
Expected result: No graphical corruptions/texture displacements occur
Actual result: Graphical corruptions/texture displacements occur
Reproducible with: 2020.3.23f1
Reproduced with: iPhone XR (iOS 13)
Could not reproduce with: iPhone 12 Pro (iOS 14.2.1), iPhone 13 Pro (iOS 15.0.0)