Something loose inside seat back tapping my back when braking

This is a strange but annoying thing I’ve noticed on my 2023 Limited: I get a subtle tap on my back from something loose inside my driver’s seat back, usually when braking or sometimes in a turn. It’s taps me right below shoulder blade height, same spot each time. I thought about removing the seat material to have a look (since it zips off from the back) but there are so many components in the seat back for airbag and seat ventilation that I gave up. Anyone else experience something like this? I’m sure the dealer will think I’m nuts, but I’ll ask next time I’m in.

 

I know people have complained of seat "crunchyness" and have had their dealer replace seat internal parts. Sounds like this is a variation of that problem.

 

I will ask the dealer to check it next time it’s in for service and report back here on the outcome.