Yes, there was an issue where Priests were unfortunately eligible for shields with a spirit stat, with both quest rewards and bonus rolls.
We have implemented temporary fix where shields with a spirit stat are no longer available as a quest reward in Mists of Pandaria content. Priests will no longer be roadblocked, but for the time being, Shamans and Paladins won’t receive the shield rewards from those quests.
We’re working to develop a better fix for this issue, and after the next fix, Shamans and Paladins will again be eligible to receive their shield quest rewards.