@pdero 

Do you have other Tapo devices? Try to use the same button to control other smart devices, observe whether the same thing still occurs. Create a new automation rule, or add the action in the existing rule with the S110E.

pdero wrote

  @Wayne-TP 

Yes, I do. As mentioned, I tried the same rule with another s110e, with the same, random result. I have s112, which I can try to set up with S200B in a few days. 

 

"Create a new automation rule, or add the action in the existing rule with the S110E."

Could you please clarify more? I have intelligent action set with S200B as mentioned before. 

 

I noticed that sometimes even when the smart action fails (visible through logs), a few seconds later an actual action is triggered (lock is opened) and this is not visible in the logs. It kind of looks like there was some network retransmission and eventually the open action succeeded. 

 

Also, are you able to look at the server-side logs to try find the culprit?

  @pdero 

Use the smart button to control other smart devices beyond the S110E—such as a plug, a light bulb, or a camera. You can either create a new automation rule or add an action to an existing one. For example: “When the S200B is single-tapped, then 1. toggle the S110E, and 2. turn on Plug A.”

Additionally, please confirm the signal strength of the switch. Delay or even malfunction might occur if device's signal is too weak. How to check and improve the network connection stability of Tapo&Kasa smart devices