Perfidy Knight Armour unique physical avoid damage not working.

Perfidy unique avoid physical damage is not working. With 40% avoid chance, I still take all damage like it was much much less.
A weird interaction happens also when you have physical damage taken as elemental instead. Since physical damage says avoid, no damage should be able to be converted at all.

Also the visual of the unique is taken from the Ashren unique armour piece and not Perfidy.