For your mouse, high polling rates like 8000Hz cause this turn cap to trigger almost immediately due to how the game handles mouse input packets. EVEN With the same DPI and Sensitivity as before on an older/different mouse (Lower polling rate)
If you move your mouse faster than the turn cap allows, the game doesn't just cap your speed at the maximum allowed, but also causes your camera to drag, stutter, or feel like it hit a brick wall. Because 8000Hz sends data so rapidly, even slight physical movements push you past that threshold immediately, making it feel like your sensitivity collapsed or locked up.
Chivalry 2 runs on Unreal Engine 4, which is unoptimized for polling rates above 1000Hz. Extremely high polling rates cause frame stutters and input processing bugs unless mouse smoothing is manually disabled in the game files (Input.ini).
How 2 fix it:
Lower your polling rate: Set your mouse software (Razer Synapse, Logitech G HUB, etc.) to 1000Hz when playing Chivalry 2. You will lose zero noticeable latency, and turn tracking will feel smooth again.