I've noticed a significant drop in bluetooth connection reliability/stability since update to 6.80.
Notifications not coming through is the most obvious signal. Phone will ring whilst I'm close by (sometimes alongside) but no notification. However, I have also had a couple of instances where time has been incorrect until I've opened Garmin Connect. Once connected time corrects instantly.
Dare I say it without being shot down in flames.... Battery life has reduced too. This could be linked to both of the issues mentioned above. No external content on at all. Only using stock faces.
Tried hard reboot but no change from that. I'm loathed to go down the factory reset route as it's always a bummer to get it back how I like it.