This is what happens when a company (ANY COMPANY ) copies and modifies a proven design without proper engineering oversight and testing.
You can only take so many shortcuts with John Brownings design before you run into trouble.
High tech alloys and CNC machining often improve the bottom line , but
NOT the design.
Colt has made alloy frame 1911s for decades , and they as well as other mfgs. have introduced and marketed lighter and shorter 1911s.
The problems arise when the MarketPlace becomes a companys
"Test Lab".
.
.