Yes, my AirPod Pros do this too, and I've found that the issue is due to a problem with the external microphones which are involved in active noise cancelling. In order to fix the problem I had to disable ANC, and use them like a pair of basic wireless headphones, which has been quite disappointing. I've found that basically any instance of dropping the headphones on a solid floor, even while in the case, will result in this rattling sound occurring.

Same here. Three pairs and all had this issue after some time. One of the pairs was a used one with the same problem.

This is exactly why I will never buy them at all again.

For the price that is insane.