That looks like an older design +2 extension. I carry a newer +2 and haven‘t had that problem. I also use a 11 coil magazine spring to ensure reliability, per Glocks recommendation.
This is a 17 mag being carried as spare so NO protection now OR when installed!I've knocked a first gen +2 off my Glock 17 years ago. It got smacked by a come along handle while carrying it in a tanker holster. I never bought another +2 again.
I wonder how much the lip on the 19X protects the +2 mags?