Constraint Profile not taking effect


I am trying to set up a constraint profile for dynamic switching in my Physics Asset. According to the documentation, I created a constraint profile, and assigned the altered constraint (closed jaw).
When I simulate the jaw still opens though. Also, when I restart the engine, the constraint profile is set back to default (None). I also tried setting the constraint profile via Blueprint with the same (no) effect. Am I missing something?

Cheers, Lena!

Physics Asset