Why does the laser particle sensor fan sometimes stop running on the Mijia Smart Air Purifier 6?

If the laser particle sensor fan sometimes stops running on the Mijia Smart Air Purifier 6, please refer to the following information:
  1. When the Mijia Smart Air Purifier 6 is powered on and the screen is on, the sensor works continuously, displaying real-time values;
  2. When the display is off, to reduce sensor usage and extend its lifespan, the sensor activates once every 2 minutes and runs for 12–15 seconds;
  3. When the Xiaomi Home App is open, the sensor also operates continuously. If the App is closed and the screen is off for 5 minutes, the sensor will work intermittently.
Note:
The air purifier will still provide accurate air quality values even when the sensor runs intermittently.