The hopper won’t automatically stop in one direction
Check that the stop sensor is the correct one. One stop sensor will not stop auto-right and auto-left. The auto-right stop sensor will only stop the hopper when the auto-right button is pressed. The auto-left stop sensor will only stop the hopper when the auto-left button is pressed.
Switch the wires on the stop sensors to see if the problem moves to the other direction. If the problem moves, the stop sensor is not working properly.