Crashs in Activity menu - sleep mode activates randomly

Hi everyone,

I'm using a Forerunner 265 for a week now. Yesterday the watch crashed two times while changing some settings in the activity menu.

Then last night sleep tracking did not work, it says "no data". Body battery is stuck at 5% since then.

Also this morning sleep mode did not deactivate automatically. So I deactivated it manually.

Few hours later it randomly activated sleep mode again...?

Only thing I tried so far, is restarting the watch and reconnecting it to the Garmin Connect App.

Is there something else I can do?

Best wishes and thanks a lot!