Thank you for this. When this sort of thing happens, you almost don't want to believe yourself, and it's chaos to pick up on reddit and read everything in there.
Here's my experience: I was happy with my Pros 2, I thought more battery and a little more ANC could be interesting, so I immediately ordered the 3. I also have had both in the "firmware beta" program, which I believe is not a crazy thing, because my OSes are all in the same betas too, nothing has crashed yet.
Yet my current Airpods have this problem that I believe is related to how ANC has been expanded:
- Mostly the left ear is affected
- I am like watching something on my bed, cover one side with a pillow, it immediately goes crazy and does this stupid hiss all of a sudden (hey Apple, that's a big no-no)
- Also of note, just because my Pros 2 are still working well: I notice a "waterfall sound effect" when I put them on, whereas my 2 are just silent.
Now I said this might be related to how ANC is being improved, because I believe it is being made into an explicit, always on computational calculus/prediction thing. Like, this system is now always aware of what sounded strange, does these detection loops, breaks down easily. Plus it is now anticipating noise by creating a "black noise" zone, which to me sounds like noise anyway, it seems like a problem to need that. My WH-1000XM4s do the same and to me that just says "we don't know what we're doing, so we just prevent noise all the time".
I now got my Airpods under repair inspection, but I invite all users to join this critique, because Apple rarely recognizes when something is off, though it has created a new problem here.