welcome my friend.
my current g19 did this, as well as my old one. weak ammo like federal champion at walmart exacerbates the problem. weak wristing can as well. i put in a new ejector/trigger mechanism housing and no shells to the face in 50 rounds so far. might work for you too.
fact is, you can cover all your bases and still catch brass in the face from the g19. just part of the mystique i guess. odd thing is, some folks never experience this with their g19's. variations of manufacture i guess.
try the things i mentioned, i'm sure they'll at least reduce the frequency.