Is it normal that when the humidifier Nuvita 1822 automatically switches off there is still some water on the bottom of the tank?

Is it normal that when the humidifier Nuvita 1822 automatically switches off there is still some water on the bottom of the tank?

The humidifier Nuvita 1822 features a sensor that detects the end of the water in the tank. This sensor is placed at a higher point than the white plate that allows the water spray, therefore, as soon as the sensor detects the end of the water, it turns off the product automatically, even if there is still water on the bottom. This ensures the humidifier doesn't continue working when there's no more water