vivoactive 5 10.20 - unstable connection and hung

Since 3 days ago after I get the 10.20 software, the connection to my phone has been deteriorated. Constant connection drop, and multiple time the watch pop up the pin and ask to reconnect. 

Removed the watch from garmin connect, reset the watch, connection is still hit and miss. Notification come in late as well.

It wasn't a problem before 10.20 software update.