I recently had to contact Garmin because I was having an issue with my Fenix 6 and pool swims. Sometimes the activity does not sync to Garmin connect, manual upload doesn’t work because Garmin Connect won’t recognise the .fit file and you cannot view any activity details on the watch. Had the same issue just last week and when you try view activity details on the watch it crashes to give you a screen with a blue triangle and then restarts. On other occasions they do sync but show up in the watch as a multi-sport activity - this throws off the sync to Strava and TP because it uses total time instead of swimming time as the activity time etc.
Images below of how the activity looks. Dotted line swim icon is the one that causes issues.
It took 15 days to get a response from Garmin. A copy paste response (because the format came up different in certain parts of the email) that completely missed the mark, its like they don’t even read your email?
Compare this to the multiple times I’ve had to contact Wahoo. More often than not I get a response with 48 hours, that is actually helpful and their ticket system follows up with you repetitively.
When this watch dies at some point you can be sure I’ll be looking for alternative brands. Taking recommendations.