I just started having a problem with one of my magazine's for my Smith and Wesson 1911. I don't think it is one of the factory mags but I think it is the Chip McCormick that I bought. I still have two rounds in the magazine when the slide stays open and the slide lock is up. I have had it happen three times in the past couple times that I have shot. It happened to me during a IDPA match the first time and twice today when I was practicing. Is there something I can do to the mag like take it apart and clean it or is it just a faulty mag?