One time when I was in Hawaii I could swear there was a club playing dance music quite loudly somewhere a few blocks over: there was that muffled quality to it where I kept trying to pick out the song from inside my Airbnb.

Walking outside (after asking my wife if she could hear it): silence. Trees rustling, normal noises.

It was background noise. But inside the apartment that combination of different sounds was just right that it sounded like muffled music to me - but hence why I couldn't identify it, whatever was there was just me thinking I was hearing things.

Draw ones own conclusions about the relative technical plausibility of the events described by the OP (how would digital packet based audio experience a glitch which is structured as though you'd tuned into another analog radio station? It wouldn't: that doesn't happen and it isn't even a failure mode).