After a few weeks of normal behaviour my Garmin Fenix 5x keeps rebooting every few seconds when it's connected to my phone by bluetooth.
It began when battery was at about 25 % indoor at the office (so no active activity was ongoing)
When I disable bluetooth it stops rebooting and works normal again.
I already removed and added the watch to the phone, did not help.
Version is 4.10 and the Garmin Connect Mobile App (Android) is up to date .
I haven't done a hard reset (factory reset) yet.
