Edit.
Disregard my responses below; "1911Tuner" is now in-the-house and answering/solving the issue in his posts, below. His expertise on 1911 issues may be 2nd to none
; I'm glad to see his answers in this thread.
***********
I'm liking Posts 7 & 8 answers, and I'll add:
-possible timing of slide's cycling which points to:
-ammo, please no reloads or somebody's favorite load recipe right now. Let's ensure the gun is working with brands of 230 grain FMJ first.
-recoil spring. Even with various brands of 230 gr. fmj, I'll notice spent casing not making it out of the ejection chamber in time, indicating I should change my 16 pound recoil spring, usually at ~3,000 rounds.
-magazine feed lips. Once that casing is pushed back into the mag's feed lips like that (any & all of the mags which this has happened to), the feed lips may now have be to wide. The feed lips can spread just from age & mag quality. I use an upper limit of .390" at the rear before replacing mag bodies. Cracks can even form at the rear of the feed lips downward along the back of the body. This isn't particularly a cause of this FTEject issue, but a result, looking at the OP's photo.
Try to share more info next time, including: make, model, caliber, ammo, history, number of rounds, barrel length (if the photos don't show), or just more photos which could answer some of the detail requests.
Good luck in the diagnosis and cure. It may be simple or a bit more complicated without knowing more about the specific 1911.