Blueprint freezes after playing animation

Hi, I encounter a strange bug in my game, that makes a blueprint freeze during execution after playing a certain animation. When my character overlaps an actor, input is disabled, a widget is shown, and then an animation is fired, before the next widget shows up. I created a lot of single anmation states like “PickingUp” or “Coughing”, that are triggered by a Boolean variable in my character (IsCoughing? f.e.). It usually works fine, but that bug occurs from time to time regarding two places in my game, Works about 30 times, then it’s bugged. I made a short video, two times everything works fine, then that bug comes in:

Blueprint Freeze

Any suggestions?