Someone in my house accidentally switched the power to my Yeelight color bulbs off and both Yeelight Action app and Google Home could no longer control the bulbs (Yeelight app said they were both offline) even though the power has been switched back on. So I reset both bulbs and set them up again (using Singapore server) but after trying for 40 minutes, the setup keep failing and I gave up and tried using the US server instead. Using the US server, the setup was successful for all bulbs. Unfortunately the scenes I created on Singapore server keep appearing on my Google Home app even though I am now connected to the US server with newly created scenes.I have tried asking Google Assistant to "Synchronize devices" and it did but still got duplicate scenes.
My Mi ID is 250232176. By the way, I am located in Singapore and have 1Gbps fibre optic connection.