Reboots on Fenix5

Hello,

since Yesterday my watch (Fenix5) reboots frequently. About 5-10 times a day!?
I didnt install or update any app,
my Watch is on:
Firmware 12.50
GPS: 2.50
CIQ: 3.0.1
BLE/ANT/SNS: 6.50
WHR: 20.03.31

Battery is at 87% right now. was charged yesterday morning.
Very disappointing.

Does anybody has the same behaviour or know what to do? I already reset the watchface to the standard Garmin, but same resets happen.

Regards Matthias