AssertionException when using AR Foundation with OpenXR Meta Bounding Boxes and Planes

Steps to reproduce:

1. Set up a project that uses AR Foundation 6.3.0 and Unity OpenXR: Meta 2.3.0. Enable the Meta Quest feature group in OpenXR settings.
2. Create a scene that enables both ARPlaneManager and ARBoundingBoxManager.
3. Run the scene on device

Actual results: AssertionException: Assertion failure. Values are not equal. Expected: UnityEngine.XR.ARFoundation.ARPlane == UnityEngine.XR.ARFoundation.ARNullTrackable

Expected results: Bounding boxes and planes work normally

Reproducible with versions: 6.3.0, 6.4.0-pre.1

Not reproducible with versions: 6.2.0, 6.0.0

Can’t test with versions: 

Tested on (OS): Windows 11 / Quest 3 (reproducible in Quest Link and Android builds)

Notes:

•