Hi ,
Sorry for delay in response. We’re trying to reproduce this here, but we need some more detailed reproduction steps. In particular, we need to know starting state of things: which assets/referenced assets are in source control, checked out, unable to be checked out, pending save, etc.
call stack you gave us doesn’t especially suggest it has anything to do with source control, but we’d like to check. Can you also /attach crash log from project after this occurs? Thanks!