I have been having some instances lately of the slide not locking on empty. Multiple Glocks and multiple magazines, so I think it’s me. I am an old dog but recently took up the newer trick of “thumbs forward “. The fat part of my dominant thumb rides right at the slide release, so I guess I have answered my own question, but has anyone else experienced this and how did you solve it? It doesn’t happen every time; maybe 1 out of 8 or 10 mags.