Single column mags have a problem with nose dive. The more rounds you stack in a single column, the greater the chance of nose dive. Lots of folks use .45 Auto, 10 round single stack 1911 mags successfully, but I've always considered them novelty items.
You may want to load up your mags and let them sit for several days, full loaded, to see if that helps your situation.
Here is an article on nose dive.
https://americanhandgunner.com/gear/...e-1911-45-acp/