Maybe something I’ll look deeper into….and thanx.Sounds as if you could use a small grinder to smooth out the rough/sharp areas.
I did that with both of my Glocks. The thingy in the face of the trigger was sticking out too far when fully depressed and irritating my finger. So I held it in the most rearward position and ground it down so it was flush with the trigger itself. Now it no longer irritates my finger and it still works perfectly.
I did change the trigger to a shorter and flatter unit that has a lip on the end so my finger remains higher. It is better but…. The OEM trigger is not a bad shape but the sweet spot makes my finger run low on it.