Isocurves in Preview obscure Displacement Rendering

I just installed the Student version of Karamba, loaded on the 64-bit version of Rhino 5, last week and everything seems to be working just fine except the preview in the Rhino window. When zoomed out to any extent, the isocurves of the geometry preview obscure the colored rendering of displacement forces or sectional forces. I have attached a screenshot to show what's happening. It occurs for all types of sections for beams. 

No one else in my class is experiencing this issue. I have looked over settings at all levels (karamba, grasshopper, and rhino) with no luck and I'm beginning to wonder if this could have anything to do with my graphics card (NVIDIA quadro 600)? 

Any help would be appreciated.