@wowaname honestly it feels like a really badly programmed video game where the engine "eats" your inputs depending on your framerate.

Like even game engines understand this, they literally will have "hardware mouse" as an optional feature because they know embedding the cursor into the game framebuffer makes it feel soupy.

I don't know. I'm not certain, maybe it's acceleration, maybe it's the framebuffer, maybe it actually eats inputs.