A lot of players are currently having a big FPS issue in Classic Raids right now.
We start the raid at our usual frame-rate, yet it steadily decreases as we clear the raid (I start around 160ish FPS which is where Nvidia Reflex locks my frame-rate and steadily go down 10-20 fps at a time until I’m at like 40 fps).
This is not a usual FPS drop, like those when you enter combat or have large AoE packs etc; this is a slow and steady FPS decrease.
However, it gets immediately fixed when we Alt+F4 or exit the game. When we log back in, we are at our usual FPS, and it starts all over again.
This is really bad as it “forces” you to alt+f4 sometimes more than once per raid in order to have a smooth experience, even on a very powerful computer
PLEASE Blizzard look into this issue and what is causing it