Rhino arctic render display issues

Running Rhino 6 and in arctic display it displays as shown in the two screen shots below at random. Sometimes it works fine. Doesn’t seem related to running other programs simultaneously. Any help would be most appreciated.

Hi -

The default Arctic display mode doesn’t show any colors so it looks like you have heavily modified yours. Does it behave better when you reset it to the defaults?
Also, please run the Rhino SystemInfo command and copy-paste the result here.