I've become a "double hammer fist pounder" on the seat my '08 came with, and it has never "unlatched.. "
yeah, some are mal adjusted from factory, and I have tweaked and bent all of the 3 different latching points. It now latches fine, with the double hammer fist blow.
you can actually see the latching, from the side with a flashlight, and see which is the offending one of the 3 points/ I think the rear one needs a tweak still..
Note to add;
I actually screwed up my seat allignment brackets when I tested a crappy backrest, which was a p.o.s., and many years ago reported on it.. it took me a full season to re-adjust the latching to ork well again.