It happened again today with the clasp switched the other way. I had placed it down on the sofa and when I went to pick the bag up again it had come undone. I think I may have nudged the moving part as I put the bag down but it really shouldn't be happening! I don't know what to do. I'm considering getting a twilly to tie the strap to the bag or some kind of charm but I'm also considering returning the bag too. That's 3 times in as many weeks now. Really torn cause I love the bag, it's low key (I wear it with the 'H' facing inwards) and it's so easy to wear but I shouldn't have to worry that it'll suddenly unclasp and fall off.