@TP-Link Hello. I do not believe it is only a matter of a false alarm on the Deco App. The LED light will typically flash red. Occasionally it will be solid red. And sometimes it will show as green...

The Deco x90 satellite will frequently disconnect from the Deco x90 main. When I look on the app, I get the error message "Disconnected from other Decos". It happens as frequently as every few hours...