I made a mod a while back that changes how the male glitch damage sounds sound. I changed all of them, but only one of them plays (in my case, only "robothurt_male1.ogg"), and only this one. I also tested this with other races, and this seems to be the case there as well (three sounds to pick from, but only one every plays in-game). This sounds like a starbound-related issue and not a mod bug, but I wanted to make sure. I can always move this thread if it need-be.