How to reproduce:
1. Open the attached “IN-121810.zip” project
2. Switch the Platform to VisionOS (File → Build Settings → VisionOS → Switch Platform)
3. Build and Run the “Scenes/BasicScene” and run the App via Xcode
4. In Xcode, turn on the “Metal Debugger” (Product → Scheme → Edit Scheme → Options → GPU Frame Capture → Metal)
5. Run the Application on VisionOS and observe the Memory Debugger
5. Idle in the App for ~30 seconds
6. Observe the Memory Debugger in Xcode

Expected result: Texture Memory is stable
Actual result: Texture Memory significantly spikes, usage multiplies twice

Reproducible with: 2.4.2 (6000.0.61f1, 6000.2.10f1), 3.0.2 (6000.3.0b8)
Couldn’t Test with:
1.3.13 (2022.3.68f1) - AR Foundation Package unfixable errors due to downgrade
3.0.4 (6000.4.0a3) - Editor crashes when building, (not reproducible on new project)

Testing environment: macOS 26.0.1 (M3 Pro), Xcode 26.0.1
Reproducible on: Apple Vision Pro 2.6

Note: Reporter mentioned that the issue is reproduced using “CreateExternalTexture”, as soon as the textured is edited in any way, several more copies appear