Hello,
I had a reboot during a long activity (~19 hours) at 10h23m with software 9.21. Yesterday with software 9.25 and during an 11 hour activity I had 6-7 reboots (I lost count), the 1st one occurring at 8h28m. Both of these activities were Trail Running.
During shorter activities I do not have any problems.
Satellite mode was All Systems. Logging was Smart in the 1st case and Every Second in the 2nd case.
Any workaround anyone? I hope this bug gets fixed soon. It is also very inconvenient that after the crash the watch restarts in Paused mode, and does not continue the activity automatically.