A couple of times now I've been wearing a quick set and it's come undone literally. Has anyone one else had this happen to them? It's a shame because I actually use both the silhouette and the quick set and like both for different reasons. Now though I'm thinking I might not use the quick set because it's come undone so many times. I try to make sure that the triangle is where it's supposed to be and that it's locked in but still it comes undone. I usually have it located on my stomach so nothing is rubbing it or anything. Has anyone else had this happen to them?