This is a really weak vw design. One kick and they are off, and moving across the rear seat, its near impossible not to knock them
They are really really fiddly to put back, tweezers to line up the mating socket properly, and then push back on hard. Just when I'm about to give up it usually goes back, but its weak after that. Might try a drop of super glue as it goes back next time.
If you get a new one, it will only happen again I think