Took mine out today also.
50 rounds I put through it I had 1 casing come back and smack me in the face out of the total 50 rounds that went through the gun today, and 190 rounds through the guns since I bought it. I dont think im going to pay any attention to it. Unless it keeps happening.
I had the same thing in my Gen3 G27. The 28926 ejector fixed it. Some have reported continued "erratic ejection" once the new ejector was installed, they subsequently replaced their extractors and the ejection then became normal, all ejecting to the right between 3 o'clock and 5 o'clock.