MRUKSubsystem Problems with getting loaded scene

I had a working sample of my own - which tracked the scene anchors from the Space I setup on my meta quest 3.

The goal was to make a custom scene alignment bp that would get scene anchors and position a virtual world relative to specific space.

One day, the scene stopped working an my "Bind Events to OnSceneLoaded" node stopped triggering and my custom alignment blueprint stopped working. It seems that the MRUKSubsystem is so new that I cannot find any docs on how to get the scene to load. I tried loading space from device but that crashes the app in built mode.

note: I have scene support, anchor support, world lock, OVR runtime (recommended), passthrough - all enabled. I also have an XRSceneActor in the scene and an MRUKAnchorActorSpawner

What do I do to get the scene to load?