I can't be the only one that has this happening.

See attached screenshots.

I had it happen in the past but luckily then it was a small drawing. This time however I have to make a series of drawing of a major model.

To be exact I have a big model and I'll be making slices of it at various depths.

What happens is that a certain part of the view doesnt' show up. Unless it does. Doing a "force regen" makes it disappear or appear. Zooming in or out makes it disappear or appear. Once in awhile panning makes it disappear or appear.

It's a major PITA when you try to detail a drawing.

Yes I have the latest approved SW driver for my graphics card and yes I have plenty of memory (barely 25% used), graphic memory (not even using 20% of it's potential), etc.

Anyone have any suggestions or perhaps even a solution ?