I have a Baikal target pistol that does what you described, but only with one of the magazines. Every now and then, at about the 3rd or 4th shot, the slide goes into battery without picking up a fresh round. The mag drops ever so slightly and the slide will not catch the new round. This only happens on one mag, of the six that I have. I just don’t use that mag any longer. If you can narrow this misfeed to one magazine, you have solved the problem. If it happens on all your mags, something else is wrong.
I don’t know this for a fact, but I’d be willing to bet 75% + of misfeeds in semi auto pistols are due to the magazine. I’d start there if I was you.