The short barreled 1911 format pistolas can be totally reliable.
BUT, due to the nature of their chopped top end, everything concerning the way they are put together "up top" is far more critical.
There are logical reasons for this and they are the increased feed angle - less slide mass - less recoil spring space & a couple of other things.
> The extractor needs to be perfectly fit and tensioned.
>Its hook should be modified to more easily release the cartrige case on extraction/ejection.
>The breech face surface needs to be smooth.
>Barrel & "bushing to barrel" fit are critical.
>Barrel ramp & chamber opening should be polished.
>Magazine feed lips should not bite hard into the top cartridge case.
>The slide & frame rails should be lightly lapped smooth to decrease friction.
>The slide disconnector run should be polished.
>Magazine springs should not be overly strong or +power.
> The pistol needs a properly engineered (and/or correct weight) recoil spring system.
So let's say that stubby 1911s CAN BE made to be highly reliable.
No pistol benefits more from a qualified "going over" by a talented custom gun smith. Because the top end can not just be quickly assembed by grabbing various parts out of the parts bins and the final pistol be expected to function 100%.
Just my opinion on that.