Bug Report: Halo CE and Halo 2 FPS drop

In Big environnement, Halo CE Halo 2 remastered Graphics get a lot of stutter and fps drop, just like the cutscenes, some of them seems to be below 15-20 fps and stutter frenquently, when I switch back to classic everything went back to normal, smooth as silk.

Same Deal with cutscenes, in classic no problem, but the remastered is full of problem.

we need a fix, its been five month and no optimisation,no fix and no patch concerning those issues