Huge MS spike because of Chat

Everytime Chat gets updated, I get a huge Spike in MS. It's really bad. Almost unplayabale.

I had to get into empty chat Global and Trade, to not get any Chat update, but Voice lines from my character or NPC has the same effect. Hunting a visp is soooooooo bad, because they will never shut up about it, lol.

Please fix asap! This seems to be around since December!!! I just encountered this in Dawn of the Hunt.