Thanks for the report! Sorry to hear that this is happening and thanks for the detailed reproduction steps, those help us a lot. I’ve filed a ticket and we’ll take a look!
Sounds good! I don’t really need this to work to be honest, but just found it while messing around. Handles can still be parented outside of the WorldModel with the Adornee in the WorldModel just fine (at least it renders; haven’t tested functionality)
Never hesitate to report hard crashes. Crashes are always a big deal, even if it takes creative circumstances that are unlikely to come up in the wild to cause them.