Savannah lag

game is REALLY slow and laggy while in savannah map, perfectly fine everywhere else. started to rubber band as soon as loaded in

I have same issue

I just had the same perf problem in the Savannah map for the first time.
I've run the Savannah map plenty of times with no problem.
But this was the first time I'd ever done an instance with the BOSS present in there.
As soon as I killed the boss, perf went back to normal.
I think the thing that was going crazy was the network latency more than anything else? GPU stats said usage was normal, CPU usage said the same. But Network latency was bouncing all over the place until I killed the boss.

Before killing the boss, I even DC'd and rebooted my whole machine just to try and see if something was up locally. Didn't make any difference.

Can confirm massive lag on Savannah map, my FPS never go down but the entire zone lags, and when the fighting stops your character begins fast forwarding really quickly.