Sounds like someone maybe put the wrong safety detent and spring in
I would pull the grip off, to check the safety detent and spring to make sure it was installed correctly. Also check the safety selector lever, to make sure it was in spec, no probs with it. But I'm sure Ruger will make it right. And it really doesn't matter what brand it is, anyone can have an off day, and KAKA does happen. At least he caught it before anything happened.