Connect to wifi and devices disappear


I bought 2 new Yeelight 1S today. I downloaded the Yeelight App and as soon as I try to add the device and I put my wifi details on and it adds it and then shows turned ON and right away disappears from my devices list… Then I cant even add then back till I reset when it does the exact same thing again…

Please help me out I am not able to use these bulbs I just bought them today 2 new ones

What is the app version?Try downloading the app again