Was the round deformed in any way?
Was it a reload?
Was it a hollow point?
A little more info would be instructive.
I learned 1911 handling from an Army six striper. He insisted that you always pull the slide back to the stop and release it. This type of jam was probably why. I follow that rule.
You make some good points. I actually trust my reloads more than I trust new ammo. Everything has been checked, sized and assembled by me and not someone or some machine from who knows where.
I don’t practice with my self-defense loads. Too expensive.
I practice with fmj. And not very often, rarely, will I fire self-defense loads, just to make sure they will still reliably feed and fire.
So, I have noticed that after cleaning and then repeatedly rechambering the same self-defense round (maybe 3-4 times), then that round will start to become seated deeper into the brass, and needs to be tossed out.