It happened all the time with 8-tracks!!  When one song got to a soft passage, you could hear a louder song on the adjacent track. Probably happened as the machine got older and the tape head got residue buildup.  Problem solved when the tape came apart at the silver tape patch (or your machine ate it.)
My best 8-track story: I was driving home late one night from a grad school class, playing an 80-minute tape I had made of Bessie Smith.  I had just driven through lovely Williston, Ohio, and Bessie was singing: "I had a man for fifteen year, give him his room and -- morgle borgle orggg..." which was a clear sign that the tape was starting to get devoured.  I pulled it out and could see that the tape at that spot was in accordion shape, and would never play again.  I was in the mood to do something dumb, so I held on to the tape, pulled it a little farther out of the cartridge, then lowered the cartridge out the window.  When it hit the pavement, it started to go clack-a-clack, and the tape began to play out.  For the next mile or two I let the cartridge bounce behind me.  I could hear it a hell of a long way back.  It probably got 10 or 15 car lengths behind me.  Ultimately I saw some headlights coming from behind me, and didn't want to get caught with Bessie Smith trailing out behind my car, so I let the tape go.  Most fun I ever had littering.