Is this not also maybe some weirdness with ANC? I have a solid pair of active noise cancelling cans (they're a hybrid in-ear/over the head setup) and they they'

Is this not also maybe some weirdness with ANC? I have a solid pair of active noise cancelling cans (they're a hybrid in-ear/over the head setup) and they they're definitely inconsistent in what they filter out. At home I could whistle and click my fingers and it would all be filtered, I was completely separated from body and mind as far as hearing went. As soon as I got on the tube, things started leaking through. (I don't want to advertise, I just bought these cans on a trial/subscription basis, so I could feel them out for a month or so in the wild with minimal risk.)