Groan and clatter from rear hatch

[GBCrewser]

Hey all,
Just bought a CPO 2017 X5 sDrive35i. Am new to XOutpost. I like the car, but my rear hatch rattles and groans when rolling over speed bumps and when the road surface is not perfectly smooth. The dealer said they 'fixed' it, but offered no technical description of the work they did to fix it other than 'we adjusted the bumpers which dry out over time'. Now the clatter is back with a vengeance one week later. I've had BMWs in the past, and know that most dealers are not a source of great satisfaction, so I decided to come here and post my questions in hope that someone is having a similar problem and has found a solution. It is my understanding that this is a fairly common problem with these cars, but the solutions are varied and tend to be 'quick fixes' but not true solutions. I'm sure the cars were silent when new, or they would never have sold. So, whatever is getting loose as the car ages should be identifiable. My latch loops all appear to be solid, and the lock is working properly. The alignment blocks mounted to the body on either side of the hatch have scuff marks on the faces that abut the hatch bumpers. The alignment blocks look like a complicated little piece of german ingenuity. The several torx screws and the springs inside the block lead me to believe they are somehow adjustable, but I have yet to find any written or illustrated procedure that shows how they can be adjusted. The only thing I can conclude is that the hatch seal simply shrinks, taking the outward pressure off the hatch lid, leaving the hatch to move, and the latches to clatter.

Anyone else have a similar issue?