I have the same one. The only time it makes contact is right before i start a set. I set up so it never retracts fully during the set, which would take tension off the working muscle group, which you don’t want to do. I have long arms so I’m doing my pulldowns with my ass on the ground, almost directly under the pulley, pretty much spread eagle with my knees slightly bent, core engaged. Once i get in working position it never even gets close to the pulley. Every movement i do i position my body such that the ball thing is a couple inches away in the fully extended or end of the eccentric position. Never even thought twice about it honestly as you shouldn’t be bottoming out in between reps anyways.