Not good indeed....
But here my procedure (similar to stickers etc...):.
1/ Cleaning of the location for the exiters on the seat with Isopropyl Alcohol
2/ Making sure that the temperature of the 3M tape, the seat and the room is above 20C (and not too humid)
3/ Applying some pressure during at least a few hours after gluing these to the seat (with for example duct tape)
4/ Respecting the 72 hours resting time for the full adhesion
If you did not do that, you now know why they needed up falling....
(if you did respect all the steps mentioned above, then I will also have a problem now
)