Rover 4.0.0 cannot change the cruising speed

ArduRover Rover 4.0
1

When Rover 4.0.0 changes CRUISE_SPEED in auto mode, nothing happens. The speed in auto mode will only run at the speed of WP_SPEED. What is the reason?
log files：https://send.firefox.com/download/b9eda88b7a52b3bd/#UBaqerwqc4eTk-f9WkpVfA