closing the Roon app and reopening does not fix the blinking red light for me. Do you mean restarting Roon server?
When I go into mybryston.com when the red light is blinking, it says to "powercycle" the BR-20, with a picture of the BR-20 unplugged. This is all that has worked for me to stop the blinking red light. I am getting the blinking light every 3 or 4 days now.
When using Roon, sometimes the display of the BR-20 says "Roon Bridge". Sometimes it says "Roon |" and sometimes it just displays "--". Strange.
Definitely a few bugs to work on.