winit: DeviceEvent::MouseMotion returns the last set value even if the mouse isn't moving

I’ve been working on implementing a first person fly camera, using MouseMotion for offset. however, even moving a mouse and stopping, doesn’t update the delta values to (0, 0) instead it keeps the last value that was set.

I understand it works by checking for mouse move, however checking and setting 0,0 if its same as last value to mitigate this introduces a lag upon camera moving around and looking.

This is what I tried and got me lag:

let (mut last_x, mut last_y) = (0f64, 0f64);
let (mut checked_x, mut checked_y) = (0f32, 0f32);
DeviceEvent::MouseMotion { delta: (x, y) } => {
                    let x = *x;
                    let y = *y;
                    if x == last_x && y == last_y
                    {
                        checked_x = 0f32;
                        checked_y = 0f32;
                    } else {
                        checked_x = x as f32;
                        checked_y = y as f32;
                    }
                    last_x = x;
                    last_y = y;
}

Any way to either not lag or have the last value set to 0? I don’t know if anything else there is to use instead for the camera…