Thorns Damage not procing

Bug Report ID: #457954181

Although im not 100% sure, this definitly seems like a bug. I am using the Unique item Crown of the Pale King which says: Thorns can retaliate against ALL hits.

My ascendancy tree says: BReak Armour equal to 10% of hit damage dealt.

I was playing, I am now in cruel act 1, and i had a base white mob skeleton hit me 4 times before the armour break proc'd and thorns. If thorns doesn't always work, im cooked, but if its supposed to always work, then this is a bug.

From my understanding, Thorns damage if hit will always proc. and seeing as it will still proc even if blocked, i can assume that it is garuenteed to hit. Also thorns says "If you have thorns damage, you inherently [retaliate] against Melee Attack Hits, dealing your thorns damage to the enemy that hit you." This combined with the helmet that makes it able to retaliate against all hits means i shouldn't be having this issue. (especially since its a white mob that can ONLY melee attack)