Probably the wrong forum, but apparently there is no 620 forum here?
So yeah, the question is in the title; did a 22 miler today and when I pressed save the watch hard crashed.
Went up to charge it, it still had something like 33% batter according to the charger when I stuck it on; but the history didn't have my run.
I guess I'm out of luck - just wanted to ask before I gave up on the run.