I just had a game as Necromancer, and tried using a bodyguard the same night as a retributionist right after the BG was hanged (so I know for a fact the ret didn't touch him a previous night). I got a message saying the corpse I targetted is missing (and of course CL died as a result of this).
According to the Fandom Wiki, Necromancer should always be given priority over retributionist when they are both reviving the same target. While that isn't the official rulebook, they tend to be spot-on so I assume this is not expected behavior? https://town-of-salem.fandom.com/wiki/R ... g_a_target
https://imgur.com/a/dxKdYSO