Bug Editor Hangs for ~60s exiting playmode when using OVRSceneManager

I'm working with the Quest 2 on Oculus Link in editor.
We're using the OVRSceneManager to do some passthrough AR stuff.
When I enter then exit play mode the editor hangs for about 60 seconds.

The SceneManager sample scene included with the Oculus SDK even has this issue for me, in a new isolated project.

I profiled the frame when this occurs, somewhere in the XR loader it hangs up.

I'm stumped, any help would be appreciated