New test release, please test

[nemyax]

Ok you should be getting a 'Move win X:Y' line for every pixel you change when moving the window,
(so it seems like something is different on your computer),
that is the event wings are using to display the dock information and to dock the window.

I have no ideas what might be wrong or how to fix that sorry.

I tried the build from the original post on a different computer with 64-bit Windows 10 and nVidia graphics. Docking and screen updates worked fine there.

Does things things work after you have moved a window?
If you use the camera in geom window, like rotating camera does the geom window update/work as it should?

The geom window works fine. The artifacts from moved windows disappear after the viewport gets the focus.