As described in the linked UDN, non-replicated components aren't being hooked up properly after an actor goes out & back into relevancy. The proposed fix sounds correct, calling MoveMapedObjectToUnmapped for the actor's non-replicated components as well.
This would be a great candidate for a regression test in EngineTest.
TBD, we could create a case in EngineTest to test this.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-76357 in the post.