I've got Forerunner 965 and Edge 530. I ride in Zwift regularly and do double recording (i.e. Zwift records an activity + I record it on my watch/bike computer with a separate power meter connected as well). As a result, I have 2 duplicating activities showing in my Garmin Connect - which is obviously expected. After reviewing the stats on both activities I remove one of the activities in GC mobile app, normally the one recorded on the watch/bike comp. After that, I see only one activity in the app and in GC Web - as expected.
Now, the problem is that the deleted activities are not deleted from my watch/bike comp. When I connect the watch or bike comp to my laptop to upgrade maps, etc, all the activities that I deleted from GC Web/mobile app appear in GC again. It creates a massive headache of going through GC and removing duplicates again.
Can this be fixed, please? IMO, GC should be the golden source - if you change something there, it should be reflected on all devices.