iOS app freezing when "vibrating on game events" turned on

Hi, I've had this problem for several months now. In the iOS app, when "vibrate on game events" is turned on, the app freezes for me every few games when I make a move. My clock then just runs out. When I turn it off, everything's fine again. This feature used to work fine until a certain update (unfortunately can't tell you exactly when it started). Would be great if you could look into this.

I'm on iOS 15.0.1 and the newest lichess app. Thanks!