Every golf round, I run the activity, keeping which clubs hit, etc... at the end of the round, Save the activity, and now the watch suddenly reboots. It will 'usually' save the generic score and lose all the shot data and ability to go through those, but the last time it didn't even do that and the whole score wasn't even saved. The activity (distance walked) does show up...but the Garmin Golf specific activity info was gone. This rebooting after the golf activity has been happening every time for the last many rounds, enough that I did a factory reset a few days ago (argh) hoping that would fix it, but it didn't help.
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