Event triggered, where another race (phalenoids) informed me that a leader (name - Mors Ven) they don't like is heading my way. I could basically kill him, accept him (which I did) and some other option, i don't remember. So, got free leader, then I saved the game and quit. After a while, when I loaded that save to continue, that same even triggered again on that turn and choosing the same option, i got another free leader with the same name (Mors Ven). I tried to do the same 3rd time, but there was no 3rd free leader. So, obviously it's a bug. I'm attaching a screenshot with a leader screen, where you can see 2 leaders with the same name.