Replaced my 1st gen Airpods pro because of this. As with everyone else, only had issues with the right side airpod and only when using ANC/Transparency mode. Purchased my pair in October 2021 and they were made Januari 2021, so in terms of the replacement program I'm f*cked because mine were manufactured too late. Complete bullsh*t I think, since the issue clearly was never fixed. This feels like planned obsolescence (puts on tin foil hat).
I have tried a myriad of tips and tricks, both official and unofficial, but nothing will fix the crackle.
Sad face.