"r.Shadow.Virtual.NonNanite.IncludeInCoarsePages 0" Not working. Any ideas?

Hello;

I have a scene that is almost entirely foliage.

Previously when I would run the command

r.Shadow.Virtual.NonNanite.IncludeInCoarsePages 0

My frame rate would triple.

For some reason today when I tried to run it again it changes nothing and the framerate remains in the tank.

I have even gone through all my foliage materials and removed any animation from them.

Any ideas why it would have worked previously but does not work now?

Thank you so much or any time and help