After maybe a 1000 rounds the slide release began to fail holding the slide open after the last shot. The first few times this happened the slide would stay back after racking it manually. No longer. Both mags fit looser now than when new ( I think) but I don't see any obvious problems with either one, the slide catch, or magazine retention pin. Holding it up with my pinky will engage the catch in fact. No idea why it has so much play now. I keep one mag always loaded with hollow points and only practice with the other one. So there is that advantage of comparing the action with a relatively new magazine. No obvious difference. Sure shakes my confidence in the long term reliability of the entire apparatus. Gun shoots and operates fine otherwise though. I've become a reluctant fan of this model for a lot of reasons actually- until now. Any ideas for a quick fix?