Instinct 2x tactical restarting

I’m not expecting anything anymore from garmin instinct watches but i have the instinct 2x tactical for 1 year now. After a tempo run (daily suggested workout), while syncing, the watch restarted. On the firmware 16.10 i believe it’s the latest software already. 

another instance that it always restarts is that when i try to calibrate the compass.

so far, i don’t see any loss of data.