“Fixed an issue where thralls could be commanded to damage other players, but could not be damaged back.”
It is confusing. But i think what they are saying is now thralls will damage at all times on PVP servers, and the bug was that you couldn’t damage them back.
I do not remember if they mentioned the after raid hours thrall damage though in a previous patch. I do know when the game was first released, for a good while (until follower were implemented???) one could damage thralls 24/7 on PVP servers. Do not know if the bug was not being able to damage them all this time, since most liked the change of thralls being turned off during non raid hours.