During the second combat in the arena map level 9 the Resistant Hide Card of the explosive zombies at a certain point was never ever rolled and always worked on all damages i did. I tried all spells at maximum of 4 damages so the zombies with the double Resistant Hide Card could resist to all my damage of course but i was not able to see the roll and every time i delivered damage the only thing the game did was showing me the card one time instead of two, play the sound that the game plays every time the armour absorbs damage and nothing else. Thanks for the patience.
You didn't state anything about the element of your spells. Were they ones that Resistant Hide completely prevents? If so, then it doesn't do the dice animation, and indeed plays as you described.
It doesn't protect "all damage" from Arcane, or at least it doesn't protect beyond the usual Armor 2. So if you're sure you used Arcane attacks and they were somehow treated like Electricity, then you did in fact find a bug.
