Question MRTK camera movement problem

When I import MRTK in unity and configure it according to the official documentation, after clicking the play button, I can see the hand by pressing the space bar. But when I want to move the camera, when I press W/A/S/D, I can only move a little distance, and immediately return to the original position after moving. Like something is restricting my movement. I configured it completely according to the official documentation, I don't know what went wrong.please help me，Similarly, holding down the right mouse button can only rotate a little angle, and it will rotate back immediately