Not sure if it’s a bug.
Description of the armour:
Every 0.5 seconds you Blind all enemies facing you and deal Damage to them equal to your Damage Reflected to Attackers stat
Scales with your Damage Reflected to Attackers stat not with the actual damage that has been reflected to attackers. Does not scale with percent damage reflected.
To my understanding, it shouldn’t work with Thornshell.
But I tried it and it did work with Thornshell. And OMG it’s so OP
Its not a bug. “Percentage damage reflected” is its own separate stat from “damage reflected to attackers”
The former is a percentage of the damage you take, the latter is a flat number. Thornshell is a percentage increase to the flat number, which is intended to work with the new Thicket item.