Wow, I’m surprised to see this. I hope your bracelet gets fixed! I would keep returning it to customer service if it continues to do that. It shouldn’t pop out like that (just moving that latch out is a pain because it feels really stuck to the bracelet and needs a little force to release it), and I agree it is an expensive piece. It doesn’t sound like you remove this piece daily either.
I did read years ago in this forum about someone losing this bracelet because it came off on its own (sorry, don’t remember which thread - it was years ago), but the SA I spoke with at the time said that was impossible - citing that the pave was the most secure of all the locks - so I thought I read the post wrong. I’m sorry to hear you are having this problem. I would ask for a replacement if it continues to do that. It depends on the store and manager approval I guess. Perhaps if you can compare to a newer one they have in stock, you could ask why that latch pops out on its own.