After latest Firmware update AirPods Pro have issues with noice cancellation

[katbel]

My AirPods Pro got automatically updated to the latest firmware 6F21. Since then only the left AirPod has a hissing/buzzing sound when is in Noise C. or transparency, it works fine when none is selected but I need to have the NC.
I looked to find a solution and found that it was a defect they had and there was a recall or free exchange till 2023. Of course I have the issue now, March 2025 🙄
I already tried few things: reset it, followed an old tip on Reddit, tried to clean it but nothing has worked.
Any idea how to go back to the previous firmware? Or how to fix it?

 

[baconcat_8964]

Most cases are due to a malfunctioning noise-cancelling microphone, which is either blocked by earwax or having simply failed. You cannot downgrade the firmware on AirPods; and if cleaning is not working, the only solution might be buying a replacement, unfortunately.

 

[TokyoKiller]

My AirPods Pro got automatically updated to the latest firmware 6F21. Since then only the left AirPod has a hissing/buzzing sound when is in Noise C. or transparency, it works fine when none is selected but I need to have the NC.
I looked to find a solution and found that it was a defect they had and there was a recall or free exchange till 2023. Of course I have the issue now, March 2025 🙄
I already tried few things: reset it, followed an old tip on Reddit, tried to clean it but nothing has worked.
Any idea how to go back to the previous firmware? Or how to fix it?

If it was the firmware, many others would be reporting the same issue. It’s most likely hardware and it happened to be around when this update took place.

I’d personally contact Apple support and see if they can help out since there is a known issue.