It's not that there is anything wrong with them, it's the fact that they are easily inserted and latched incorrectly. Proper insertion of the magazine requires both care and attention. Rear first, (the rear) fully inserted, then rotate (the front) into the well until it latches. Whether you're in a hurry, in the dark, wearing gloves, out of practice, or just unfamiliar with them, they need to be inserted correctly.
If, for example, the rear wasn't fully inserted the magazine might latch into place but still be sitting too low to feed.