I’ve had Fidlocks on my MTB & gravel bike for a couple of yrs now & they’ve been faultless. Riddden Finale, Alps, & rough local stuff & never lost a bottle.
Ive never dishwasher them, as they clean up just fine in the sink, also, the magnets are in both the mount & the bottle, which is why you can’t reverse the mount as it also reverses the polarity of the magnets & the bottle resists rather than attracts.
Incidentally, I’ve also bought their magnetic Bordo lock mount, which means it’s easy to take the lock into town without having it permanently fixed & taking up a bottle mount. brilliant idea.