Thanks for posting this. I wouldn't have thought about this happening. Do you have photos of the lift parts with the strut? I am assuming there is a top of strut spacer with a large diameter hole.
I installed the rough country 2.5" lift myself. It has a steel plate on the top of strut with a small diameter hole. My guess is that plate mimics the vehicles strut tower, compresses the center of strut, and keeps the center of the strut from spinning. That said I am going to check that nothing like this is happening on mine.
I don't see that procomp makes a kit for the tahoe/yukon so maybe you have the wrong kit for the vehicle.