XR drag interactable randomly stops working

I’m using XRI with PolySpatial (unbounded) and experience that dragging of objects randomly stops working. Sometimes I can drag one object, and the other ones stop responding, sometimes the other way around. I experience this accross different Unity projects, all started from the XRIDebug PolySpatial sample scene.

Are there known issues with XRI & PolySpatial?

edit: might have something to do with adding a plane with mesh collider to the scene, which Polyspatial/Apple may not like. I’m not sure yet.