They're supposed to. We just double-checked with the developers on this, as we've seen conflicting information go out to players. If you get loot from world bosses that isn't for your spec, that's a bug and the item flagging needs to be fixed. Be sure to report specific items on the Bug Report forum.

Apologies for any confusion in this regard.
If we got loot not for our spec and report this as a bug will we get a the correct loot example i have paladin tanking legs from Sha but i was ret reporting that will my legs get turned into the correct ones? If not then idk if i care enough to put in a ticket

I doubt it. The fact that you won something you can't use for your spec doesn't necessarily mean you should be given something you can use. Customer Support would have to decide which spec-appropriate loot from the boss to give you, which doesn't seem like a fair compromise.

I understand that getting an item you're not supposed to be getting isn't fair either, but there isn't a very good solution I can think of to compensate for this on an individual basis. Either way, I don't decide CS policies and will let them to speak to that. You could inquire on the CS forum and reference this thread to see if they can provide any insight.

Bonus roll issue.