Monster Hunter Wilds can't reach 60 FPS without Frame Generation

Hello,

For the past few days, when I play Monster Hunter Wilds on GeForce Now, I can't reach 60 FPS without using Frame Generation. I've also tried lowering all settings to minimum and the resolution to 720p, but the game still runs at 45 FPS at most.

Why is this? How can I fix it? I would like to avoid using Frame Generation at 45 FPS, because the input becomes a bit laggy.