Screen doesn't update until mouse pointer moves over it
Description of problem:
When changing the color scheme in CDE, the screen should change 
color everywhere at once, but doesn't do so. It only updates 
in the area where the mouse moves. And there it does so over 
the whole width of the screen .
Steps to reproduce:
1. Change color scheme in CDE
2. Move around mouse pointer
Additional information:
Screen capture of the problem
https://youtu.be/qZJzACIxSuk