Opaque nameplates after WG rezz bug

I died in WG when we won but hordes captured all graveyards. I was placed in a horde GY and there is no corpse mark on map, waited 30 minutes until I saw all graveyards become blue, I ran back to the GY near our FP, finally got rezzed there. A few minutes later, a GM responded to my ticket and I told him I just got it resolved and closed the ticket.
Now here is the problem. I hearthed back to Dalaran and found something terribly wrong. The nameplates of all npcs/players around me behaves as if I am still a ghost, or I am still in battle. These nameplates are bold, big and opaque. They only appear on non-hostile npcs/players, but not on your attacking target or hostile players. There is also a health bar with the level on the right end of the bar, which is what you saw on hostile mobs/players in combat. But this one on mine is acting in an opposite way, which is so annoying. Since the nameplates are big and opaque, it is blocking a lot of things in my sight. Hard to target enemy, hard to loot an item. Besides, my pet also has the opaque nameplate and it is green (flagged) although I am not flagged. In Dalaran, my screen would be flooded with opaque nameplates, make it very hard to play the game.
I tried disabling all my add-ons, but it does not help. Relog does not help neither. I also tried logging on from another computer too, still the same. Alt-Z will remove the opaque nameplates and now I can see the transparent nameplates, but you know I can't play with ALT-Z on. I also tried died in WG and rezzed again but still does not help. All my other toons do not have this problem. I believe that this is a consequence from the rezzed bug. Some server-side internal variables of mine must be corrupted. Please fix my status. These disturbing opaque nameplates are occupying 50% of my screen constantly. BTW I did not change any of my interface options when this happened, and some tries on changing the name setting does not work as well.