since the update to version 6.8.1, I am experiencing a really slow response from the NX server running on a headless (e.g. no connected monitor) Ubuntu 18.04 machine. It seems to be related to the display manager (sddm). When I reboot the server computer, sddm is running but without drawing any window decorations like the title bar. In this case the performance is normal. If I restart the nxserver (“sudo systemctl restart nxserver”) the window decorations are drawn again, but than the NX server performance is really slow. Also running “glxgears” are showing a frame rate of just 5 fps.