Stun recovery does not affect Player Heavy Stun

I don't see why it shouldn't. I don't see any change with and without my 80% stun recovery amulet.

Tested and checked with timer on 30%,80% and over 100% interval of stun recovery stats. The amount of seconds it took to recover from a stun is EXACTLY the same.

Either stun recovery is currently nor working as intended, a bug or tooltip on it is misleading.