The top of the bracket will contact the frame at full bump stop compression. I had the same issue, even with active bump stops, and more or less did the same thing with an angle grinder. It’s not a lot of contact but any bracket-to-frame contact seriously concerns me, either in damaging the frame or more likely causing damage to the bracket mount which might cause it to loosen over time or possible even shear a mounting boltPhotos of what you’re talking about?