Cursor trail puzzle

Hi,
I have a graphical problem as shown in the image.
Whenever I try to dimension within all views styles other than 2d Viewport (image shows Hidden view style) i get a colourful cursor trail.
I have tried all the Glswap modes without success.

Bricscad Version 19.2.15 (x64)
Running Linux Mint 19.2 Cinnamon.
GPU- Nvidia Quadro P4000

I want to move to Linux for all of my work but must admit Bricscad seems to run better on Windoze, and I'm not sure why.....
Is there a better Disto for BC?

Any help is gratefully received.