I fixed mine. My problem was it paired, and said it was connected, but then dropped the connection.
I did all the basic troubleshooting because yeah. That didn’t work. I found out it worked on my phone, just not my PC. Hmm. I looked at the drivers. There were two for Braven 805. Hmm. I checked for updated drivers. Nope they were both up to date it said. I disabled the Braven 805 avrpc driver and retried connecting. Tada. It worked. I Don’t know why. I learned that avrcp is a bluetooth profile, Audio Visual Remote Control Profile https://en.wikipedia.org/wiki/List_of_Bluetooth_profiles#Audio/Video_Remote_Control_Profile_(AVRCP)