I can't see the front faces of the barrel lugs, but if they have a stepped shape, there's insufficient vertical engagement of the lugs, and they're engaging horizontally near the corners when the gun fires.
If the corners of the lugs are radiused, the barrel isn't clearing the slide before it stops on the impact surface in the frame. That could be due to the lower lug being located too far rearward, the impact surface too far forward, or late/delayed barrel drop timing. Could also be caused by the frame barrel bed not allowing the barrel to drop low enough to get out of the way of the slide.
Either way, it's Kimber's problem.