Thanks for the update. Based on my previous theory here High pitched noise on AirPods Pro 3 - Apple Community I can’t see how any firmware update will fix this. I think they are going to have to re-design the EarTips to prevent the condensation / moisture buildup. It would be interesting to try the AirPod Pro2 tips on the AirPod Pro 3’s but obviously they don’t fit…
Comparing the design of the 2 models, the black mesh surface of the Pro 3 is more convex than the Pro 2 and therefore sticks out further and I suspect is actually touching the white mesh surface in the eartip. Any moisture would therefore get stuck there between the two layers …
I have done many more 2hr + bike rides since my post linked above and every time this issue starts, if I remove the tips, wipe the black mesh on the AirPod, and dry inside my ear it fixes the problem for the next hour, then I just keep doing it every hour to the end…