Why doesn't the PnF Conveyor stop immediately when the sensor is triggered during simulation?

Simulate in Robot Virtual Commissioning using the PnF Conveyor type defined by Equipment Design. When the sensor is triggered, transportation does not stop, but continues to move forward for a certain distance before stopping. What should I do in this situation?

Two types of conveyors, Belt and Roller, were used with the same settings and no such errors occurred.