I have a new Jaybird Vista and it was running absolutely fine with my Garmin Fenix 6X till the new firmware (12.20) got installed this morning.
Since then I went out for a run. The Jaybirds were paired with my Fenix like before. They got disconnected twice in the middle of a run all of a sudden. Reconnecting them worked a few times but then that too stopped a while later.
The earbuds are totally fine. I don't carry any other bluetooth device(no HRM, no phone) for a run.
If anyone else is experiencing this, I would love to know. This is happening since this morning after the 12.20 uodate , I repeat.