When connecting to a linux client, the keyboard on the host doesn't work on the client until you hide the "Your screen being controlled by YourNameHere" window. Clicking in text boxes doesn't work. It seems like the little status box grabs all keyboard input.
Hiding the status box seems to fix the issue in all cases once I discovered the workaround, but then the client no longer has a way to kick you off, or see when they are no longer connected.
Customer support service by UserEcho