It's not supposed to do that and flake off quite that bad all at once. I suspect it is due to poor curing of the plating which is effecting it's durability. It should last a long longer than 100-250 rounds but who knows what their QC standards are right now with as long as their backlog is.What's the point if it's essentially worn off after 250 rounds? My G40 was brand new, this is wear from 250 rounds.
The trigger bar is rarely centered over the top of the plunger but is pushing more from one side. Try using a black magic marker to cover the top of the plunger and then do about twenty or more dry fires to see how much it has rotated.Is it designed to do so? What imparts the rotation? Any concerns with the new 5th Gen FPS?