Out of some 10 servers, I have about four that, when I create a thumbnail view and/or full screen VNC connection, both will crash after a random amount of time with a box that states "SmartCode VNC Viewer (yellow triangle with !) VNC server address: SERVERNAME. rdr::EndOfStream".Immediately afterwards I can reconnect with no problem, but after another random amount of time the same issue always occurs, and always with the same servers.
No commonality between breaking servers, that is different from the servers without the issue. I have uninstalled previous VNC clients and re-installed the SmartCode VNC built-in RealVNC on all servers so all are configured identically.
Just upgraded to 3.6.21.0 and will see if that helps. Previous version was 3.6.19.1.