Why does the countdown function not work when I set automatic device shutdown after 4 hours?

The countdown function is canceled if you turn off or reset the device during the set time period. If you want to shut down a device after a period of time when a scenario is triggered, start the device and enable the countdown function, and ensure that the device is not shut down or reset within the period.

After the above method, if the countdown is still not possible, please provide us with the date and time of the specific operation, which will help you to further investigate.