@kpstool 

Sorry i'm not following. Do you mean the schedule settings stop working after a few days? What happens if you create a new schedule?

kpstool wrote

  @Wayne-TP Well,it will be normal for a day or two as long as there is an internet connection.

And I discovered it turns off the lights early in the scheduling cycle, because I setting two turn off trigger,maybe is clock error?

  @kpstool 

This article should be helpful for you, take a look. What to do if schedule/timer/away mode not working properly for Tapo/Kasa smart Plug/Switch/Bulb/Light Strip

For further investigation, please get in touch with the local support team. Contact Technical Support

kpstool wrote

  @Wayne-TP Thanks .But,the problem still exists.

 

And based on my observations over the past few days,I've noticed that it seems to need to connect to the internet at least once a day.This setting is necessary for it to work correctly. The internal clock might malfunction if it doesn't synchronize for more than a day.

  @kpstool 

Under normal local network operation, a smart bulb’s time should not deviate significantly within a single day. However, if the bulb experiences a power interruption, it must reconnect to the internet to synchronize and recalibrate its internal clock. Otherwise, any time‑dependent settings will stop taking effect. Has your device experienced a power loss, for example, by being turned off at a physical switch?