i replaced my catch spring with a new mil spec one, and called smith and got a replacement bolt catch. this seems to have resolved a similar for me about 1/2 the time (used to happen after every mag.) now the issue is isolated to 3 or 4 specific mags. this is probably a combo issue bolt catch/mags. you'll have to send mags back for replacement (i'd try a new/different proven one first), but you may be able to get them to send a new bolt catch.