So I updated from 4.12.5 to v4.14 today, because I thought it was time…
Now after the usual fixes in the code I ran into another problem ehn i want to play my level…
Whenever i jump into my level and want to play everything goes fine until 2 to 5 seconds after the start. Now the Engine/Level just freezes and i can’t do anything. In the taskmanager it still counts as running and if I start it with visual Studio I also get no Errormessage.
Update: the same happens now when I just press Jump(spacebar) in a new level…
So I’m free for suggestions what could be wrong 
About the level:
It is a complex level. Containing various Blueprints, the Scene Sequencer for example, some AI Character, Blueprints to Interact,…
It is not detailed about models ore smth like that. This is all real basic stuff.