i just upgraded on my on premises Control server to 20.1.27036.7360 last night. This AM I was dialing into a few clients machines and was having issues when I would disconnect the server was showing I was still connected (technician).
I was able to go into Admin-->Security-->Revoke Host Session Connections in order to continue my work. but then I disconnected from the last machine again and AGAIN it hung holding onto that session. Eventually it timed out, maybe 10-15 minutes? But I have three licenses so twice I had to revoke the host sessions to continue working because it wasn't dropping them. Just seems like a bug in the new version?
Customer support service by UserEcho