I've been fighting with my watch constantly after the latest Bluetooth update (ANT/BLE/BT 4.30) last month with the phone connection disconnecting and not being able to re-pair the watch. Currently I'm watching the watch endlessly spin on "Initializing" or "Go to the mobile app to continue". This is after multiple reboots of the watch and phone, turning the bluetooth on the watch on/off. I've removed the watch from my phone's bluetooth list, removed it from Garmin Connect. If it does manage to pair and sync, it will randomly stop being connected to the phone while saying it is still connected, but none of the notifications get pasted thru and Garmin Connect can't sync. As well I've now had this issue with two different phones as I just got a Pixel 4 last week replacing my Pixel 2. Today when I forgot my Edge 530 at home I tried pairing all the sensors to the watch which couldn't find anything. My HR strap that it had previously been paired with only ended up connecting randomly 10 mins into my ride. All in all this has been super frustrating having a previously working device just get trashed after an update.
So to my question, can I downgrade to the previous Bluetooth version. I never had any problems with the last one.