Responding again: I realized my tests so far have been in a more recent engine version and that may affect my results compared to yours in 5.4. When you have time to debug again, can you also check at the moment BundleHandle->IsLoadingInProgress() returns false, whether:
- Do the soft referenced bundle assets appear in BundleHandle->ChildHandles?
- Is bLoadCompleted true on all those ChildHandles?