I'm using the latest version of the game.
I was playing an 8th level Lightning Cleric and my cleric was hit with a lightning bolt by a goblin shaman. Not to fear, I have Lightning resistance! Um, no :(
What happens is when the lightning hits my Cleric, I am asked, "Do you want to Absorb (or something) the Lightning?" I was like, "Heck yeah!" I hit the accept and... I am hit for full damage???
Wait, isn't this signature lightning skill supposed to Heal me and take Half Damage (correct me if I'm wrong)?
When I checked the log, it says, "You are now resistant to FIRE" This could be the problem :)