I went through three pairs and the third one is perfect but the other two definitely had issues. Apple employees looked at me like I was crazy but I know what I hear. If it bothers you enough exchange it there’s definitely pairs without any problems (like my current one).I might have great hearing: the hissing noise with ANC on is LOUD and it's not even a question if it exists or not.
Does anyone hear any noise even when ANC and all advanced features are OFF?
I can hear it as well, very faint, but annoying enough to go back to AirPods 3.