Timer does not autorestart

I use timer autorestart for reps in Strength workout

In the beginnging it woked well and autorestarted enlessly

But in the latest firmware update it suddenly stops autorestarting after a few reps. There is no pattern. It could autorestart 5 times and then stop or it could be more or less

I have to push the button to restart but it stops again after a few autorestarts

Any ideas how to fix it?

I think it is a bug but could not find a way to report it to Garmin

I use the latest firmware update