There was recently a fix that went in related to some tick issues in 4.12.4 that may be related to this issue. Have you been able to give this issue a try in 4.12.4 to see if the problem may be fixed? Here’s the commit for the bit I’m talking about: .com/EpicGames/UnrealEngine/commit/1edb2b8d7ef8ba1df20a5cdd4c185d8e775b9508