I'm running the ConnectWise host on Mac OS 10.13.4 connecting to computers running Windows. Sometimes when I move focus to another Mac application and then switch it back to the ConnectWise window hosting the remote session, all keystrokes are treated as if the windows command button is pressed. This is similar to reported here
https://control.product.connectwise.com/communities/6/topics/953-stuck-windows-or-command-key-in-session-after-having-lockedunlocked-the-host-machine, but, in my case, the issues does not involve the lock screen at all.
Customer support service by UserEcho