I've flown twice with my new AirPods Pro 3, and both times I had this exact experience; high pitched and loud feedback. They were properly cleaned, and had a "good seal" according to the settings wizard.
Glad to see I'm not the only one at least, and hopefully this will be possible to fix as a software update, rather than having to replace the AirPods.
Glad to see I'm not the only one at least, and hopefully this will be possible to fix as a software update, rather than having to replace the AirPods.