I own a FP3, which is currently running /e/ OS 2.1 as well as a Fenix 7. I’ve been using this combination for about two years now and it was always working just fine. The connection was stable, if I left the room where the phone is and returned, they reconnected in time.
However, in the last couple of weeks, I noticed that sometimes the connection seems to get stuck. The Fenix is still shown as being connected on the FP3, but Garmin Connect (the corresponding app) can’t sync and the Fenix shows that there is no data connection.
To fix this, I have to turn off the bluetooth on the FP3, turn it on and reconnect. Then Connect can sync phone and watch again.
I’m not 100% sure, but I think this is happening since I upgraded from 1.21 to 2.0.
At least I’m 99% sure that I never had this phenomenon on 1.21 or previous versions.
Deleting the cache for Connect did not help, so the next step I tried was to uncouple and recouple the Fenix and the FP3. I had to setup a couple of things again in Connect, but ever since (1.5 weeks now, I think), I haven’t seen the issue again.
From that it seems likely to me that the issue was on the OS side in the Bluetooth setup and not in Connect, but it’s of course not certain.