Same here. Normal FPS until I enter an instance, my FPS goes from 117 to 30-50 and is microstuttery.
- Nvidia 537.58 — Parked on this version until the Discord streaming issues are fixed.
- Happens without any addons. I even moved my WTF folder and tried again.
- Reloading has no effect on it, but restarting the game fixes it so long as you aren’t leaving the instance.
Edit: Abandon the quest “Sharing a Bountiful Feast”, it was causing this issue for me. Found on the EU forums.