FWIW I had the exact same problem with a second-hand ATI 1911 CS (Compact Slide - a.k.a. Officer's model)I bought at auction.
The recoil spring was weak and slightly kinked. It wouldn't reliably return to battery on its own, but MOST (not all) of the time I could push it forward that last 3/16" with my thumb and it would fire again. Sometimes it would fail to go into battery again on the next shot, sometimes it would fire the next few rounds before doing it again. Once or twice when it failed to go into battery I couldn't push it the rest of the way forward with my thumb and had to re-rack the slide to chamber the next round.
I got a new replacement recoil ring, installed it, and problem solved. That may or may not work for you, but it did for me. YMMV.