Characters aren’t dying?

I’m not sure if it’s something I did, or if it’s a bug, but I’ll get a notification that one of my characters (scientist, official, ruler, etc.) has died, but then will a pop up that says the character has “overcame death”. It’s still early game kind of, and the first round of leaders are starting to die, but then not. Is this happening to anyone else?

(PS: it is entirely possible that I missed something that is causing this, but I don’t think I did anything to do this)