First person camera controls are faulty

When I go into first person perspective, and move the mouse around, often the camera/character rotate.

const MyEcctrl = forwardRef(({ children, pos, perspective = THIRD_PERSON, props = {} }, ref) => {
  return <Ecctrl
    ref={ref}
    dampingC={0.1}
    floatingDis={1.5} 
    autoBalance={false}
    animated
    position={pos}
    jumpVel={0}
    {...(perspective === FIRST_PERSON ? {
      camInitDis:-0.01,
      camMinDis:-0.01,
      camFollowMult: 100,
      turnVelMultiplier: 1,
      turnSpeed: 10,
      mode: "CameraBasedMovement"
    } : {})}
    {...props}
  >{children}</Ecctrl>
})

Here's my code.

Any idea how to stop this bug?

No source file or test is named. Start by reproducing the first-person setup from the reported Ecctrl snippet and isolate when mouse movement causes unintended camera or character rotation. Done means first-person mouse movement no longer produces the reported faulty rotation.