I am also getting this issue constantly with Full Control mode and have been for some time with various versions. Sometimes I get the error message, but sometimes it just locks up with no error. A reconnect always works first time. Both the host and client have fast stable fibre connections. It would be interesting to know if it is the client or the host which has the connection issue. For various clients I have to use [censored] and VNC from the same client PC and they never drop a connection.