Same exact experience here and also with the left AirPod. Everything goes well until the AirPods get just a little bit wet or greasy (say, in the rain, after a run, or a few hours into wearing them) — then the seal loosens and I get a painful high-pitched hum when trying to put it back in it is place. I wonder how safe that sound is bc its pretty uncomfortable.

The seal also changes with any significant jaw movement (which I also do a lot in-flight normally) — noticeable degradation of noise cancellation, which then goes away (not sure if its the foam or anc adjusting).

Tried to use my AirPods Pro 2 earhooks, which partially solved it - although at the cost of that crispy sound. Found best to just wipe the AirPods dry/gently blow around the grills before adjusting (which makes them unusable for running unless you’re willing to stop all the time).

Such a shame every APP iteration has some noticeable flaw. And especially when they solved a similar problem between the first and the second gen.