thanks for responding, but I think java is not the reason (JavaViewer is disabled). I tested it on 3 machines (2xHW 1xVM) and I see the same problem. Connection is over intranet.
I see this behavior only in PowerPoint. And there only in the edit area in the center. A disable/enable of the Video Hook Driver fix the Problem but after reconnect the refresh problem is present again.
I think there is a initialize bug in the Driver. I canâ€™t see this in an older UVNC version (18.104.22.168)
Regards from Germany
PS: I hope you can understand my English