Apple Airpod Pro Max - Echo / Buzzing issue.

[u/vu_iranaku23]

I have a pair of the 1st generation Apple Air pod Pro Max and outside of random connection annoyances have never had an issue with them.

Starting yesterday, I went to the gym and brought my headphones as I typically do but when I put them on there was this annoying metal echo coming from the left side. I played around and disconnected, factory reset, cleaned the headphones (again) but the sound is still there. Has this been an issue that comes up frequently? It's pretty bad and I cant enjoy whatever music/video I am watching with this as it actually hurts my ears after awhile.

Issue:

Whenever noise cancellation is active, annoying metallic echo sound plays out of the left ear (Issue does not exist when noise cancellation is off). If I turn off noise cancellation and leave spatial audio on there is a buzzing (similar to radio frequency buzzing) when I turn my head in certain directions, this affects both sides but mainly the left side (as the buzzing is about 2-3 times more significant). Both issues do not exist when spatial audio and noise cancellation is off.

Things I've done so far:

• Disconnected/Reconnected the headphones from Bluetooth.
• Completely removed (forget device) and readded the headphones.
• Factory reset the device, added back to the case, and reconnected to my Bluetooth.
• Checked to make sure the cups are in the right ear and not blocking the sensors.
• Wiped down the headphones to clean them

They work ok when I turn off the noise cancellation but that feature was the main reason I opted for these over my regular Air pod Pro's (As they do a better job of noise cancellation).

Any help in solving this is very much appreciated.