There appears to be a bug with Zealous Crusader, which alters the attack, but not the health bonus, gained from attacking the orb. I ended up with 1 crusader at 2/8, and another at 4/8. I don’t have a screenshot unfortunately, and will make sure to grab one next time, but the circumstances included:
Amai Merchant used by opponent
Blightborn Spectre on board for opponent.
There are still times when the local display of information doesn’t match the server’s (I’m guessing there’s still some server to client protocol bugs regarding health & life). So far, every time I have the ability to test this, the server’s version appears correct, i.e. matches what I had expected given the rules of the game.
Did you try attacking anything with the “2/4” or the “4/8” and see how much damage was actually done?