I Quoted myself here:I and my wife have never had that problem with either mags we have both also. Somethings not right, weak spring something bent, etc. I would send it back for repair. Might do some other things to it while it is there. We have found ours to be reliable.
I should have added that ours were early ones purchased in about 2012 before the big rush, which might be a factor. I would guess easily 500-600 rounds each with a mix of both mags. Thanks for posting and the links, If we start having problems we will know where to look.