User Description: The Perception System crashes when exiting PIE on UAIPerceptionSystem::UnregisterSource.
It doesn't check for null sense classes which are there by design I suppose.
I transition maps and some of them have AICharacters with different senses so senses not registered are ZeroInitialized in UAIPerceptionSystem::RegisterSenseClass causing their corresponding Senses[SenseID] == nullptr.
This was not reproduced internally (we do not know how). JIRA entered at Mieszko's request.
Head over to the existingAnswerHub thread and let us know what's up.