[jefffan241]

I had the same issue and rebooting my watch (not hard reset, just reboot [press and hold the back and select (middle button)] for 10 seconds until the pebble logo shows) fixed the problem. Just in case anyone else has this.

[TeMPOraL]

Yes, reboot seems to fix the problem in some cases. My watch didn't crash again after the reboot earlier today.