Note: this is not a request for troubleshooting help.
For the past few years my 10ish year old “smart” TV will maybe once a week or so completely lose the ability to play sound in the Youtube app, and only in the Youtube app. Sound works just fine everywhere else. Bizarrely this is always triggered by an ad and never a video. Restarting the app doesn’t fix it, and neither does clearing the cache. Fortunately doing a full restart of the TV fixes it, it’s just irritating to have to restart because an ad somehow broke the sound.
What technological gremlins haunt you?
That sounds almost exactly like youre picking up radio signals. This exact thing has happened to me before, I even picked up a local religious station like I’m assuming you did. Some of the churches in my area have their own little radio broadcast antennas and thats why I think their signal was the one to cut through. Speakers and headphones have been been able to pick this stuff up for like as long as both technologies have existed. You’re not crazy and tons of people have been through this