An InvalidOperationException is thrown in the Editor when using On-Tile Rendering with the Mock HMD plug-in

Reproduction steps:

1. Open the attached “IN-142532” project
2. Make sure the “Tile-Only Mode” on the URP asset and the “Mock HMD” plug-in provider are enabled
3. Enter Play mode

Actual: Multiple errors are logged
Expected: No errors are logged

Reproducible with: 1.5.0-exp.3 (6000.5.0b8, 6000.6.0a5)
Couldn’t test with: 6000.0.75f1, 6000.3.15f1, 6000.4.7f1 (Tile-Only Mode is not available)

Reproducible on: Windows 11 (by reporter), macOS 26.4.1
Not reproducible on: No other environments tested

Note: Logged errors are:

1. Adding the final blit pass when Tile-Only Mode is on. This is not valid and will throw an exception. Likely, an On-Tile Feature has requested the intermediate textures but did not correctly copy the data to the backbuffer.
2. Render Graph Execution error
3. InvalidOperationException: The On-Tile Validation layer has detected an issue: render pass 'BlitFinalToBackBuffer' calls 'UseTexture' with resource '_CameraTargetAttachment'.
   The On-Tile Validation layer is activated with the setting 'Tile-Only Mode' on the URP Renderer. When activated, it is not allowed to sample (RenderGraph.UseTexture) the cameraColor or cameraDepth (intermediate) textures or the GBuffers or any copies of those. You need to disable any of the following that could cause the issue: a URP setting that would break the native render pass, a ScriptableRenderPass that is enqueued from script, or a ScriptableRenderFeature that is installed on your URP Renderer.