Yesterday I did a Pool Swim activity and during the 5th lap my Forerunner 935 crashed to the blue triangle screen. After a couple minutes it restarted itself and I was able to start a new Pool Swim activity; that one worked fine.
The crash left a corrupt FIT file on the device (attached here). I examined it using the Fit File Repair Tool and there's not much data. It does contain valid time stamps but almost nothing else, it didn't even save the activity type. There is an ERR_LOG.BAK file from the time of the crash but I don't know what it means.
Has anyone else seen a similar problem? I know there were intermittent crashing issues with older firmware versions but I'm using the latest 14.10. I chatted with Garmin support and they weren't interested in investigating the root cause as a possible firmware defect until it happens multiple times. Instead they just wanted me to delete all the activity and other files. So I'm checking here to see if others have also run into crashes and file corruption like that.
I was swimming in a 25 yd pool and wearing a HRM-Swim chest strap.