Playing from Trondheim, Norway.
I have not experienced this much lag since the launch of the game. It naturally happens only during the two new bosses, as there are a lot of people around. I suffer no noticeable framerate drop, but cannot use my skills or transmit chat messages for minutes at a time. I’ve also had disconnects.
I hope you fix it soon (I assume it can be fixed as I didn’t suffer from this during i.e. the Queen’s Jubilee).