4.16 Crash after LPV Enabling

Hey, i have an Strange Problem in Ue4,
I enabled LPV in my Config 2 Days ago, Today, i Started my Engine and the LPV Line was not anymore in my ConsoleVariables, than i enabled it Again, and now everytime i “Play in a New Editor Window, my Game crash instantly”

On Simulate there are no Problems… any Ideas?