It could be the associate becomes invincible to all guns perhaps.. well the associate gun shooting you is understandable, not sure about the other two guns
So here's the game link first and foremost: https://epicmafia.com/game/3942425
I'm going to try to explain what happened to the best of my ability.
I was associate. I can give a gun once per game and that gun will not be able to kill mafia members. In this game, I gave Johker the associates gun. There was also and illusionist gun and a sheriff's gun.
Day starts; Johker has the associated gun. Illusionist shoots me for some reason; I don't die. I did not have a vest. Confused, I asked for the real sheriff to shoot me. She does, and again I do not die. Finally Johker tries to kill me, and I also don't die.
So yeah. I don't know if Illu trying to kill the partner triggered it, or if theres a wierd glitch where if Associate has given out gun they are invincible to ALL guns, or what. But somehow last game I ended up turning invincible, and it might want to be something you look into, just in case it's NOT some super complicated process and actually a mechanic with guns in general that's bugging.