I have a user who uses both the Webex app and the Webex Contact Center desktop applet. The user puts themselves in the "available" state in Contact Center and within a minute Webex changes their state to "On Call" which then state syncs to Contact Center knocking them out of "available". The Webex "On Call" state is also stuck this way unless we perform a Reset on the app, but the problem just happens again.
No call was received as far as I can tell either..
None of this is on prem, it's all cloud.