Hello,
Since a week maybe two the IFTT integration stoped working properly. I made a little debuging and IFTT service looks OK. It still fires up the widgets and is connected to yealight. From IFTT I can only turn on and off the devices. Any other functions like brigtnes change or scene change not working. I tryed to reconnect the IFTT do Yealight sevice but this wasn’t help.
I see at forum similar topics with google home and alexa. Maybe this issues are related?