@FCzr 

Hello, thank you for raising this concern. Here are some tips that might help with this problem, check it and let us know how it works.

1. Check if there are any schedule and smart action (automation, shortcut) rules created for the plug in the Tapo APP. 

2. If you have Google Home, Alexa, or other smart home systems that are linked with Tapo, check if there is any automation or routine created in their APP. 

3. Reset and reconfigure one plug, give it a different device name and do not create any rules for it. Test if the problem still occurs on this plug. 

If the problem still exists, please share your TP-Link ID and the Mac address of your P110 to me via PM, we'll help to look into it!

Hi,

It seems that the problem was solved via enabling Internet access to the plugs (I blocked their access to the public Internet some weeks earlier).

Which is kind of annoying as I specifically would not want them to be accessible from the Internet.

None the less the problem is now solved.

Br. C

  @FCzr 

In order to synchronize the correct time, internet access is needed for the schedule feature. Without internet access, the schedule feature is functional unless the plug loses power or disconnects from wifi, which will interrupt plug's existing time calculation.