Yeelight bulb not detected by Alexa app


I have a Yeelight 1S color light bulb (YLDP06YL) and it’s working just fine with the Yeelight app, Google Home and Apple Home, but it’s not discovered on the Alexa app. I’m on the Singapore server in the Yeelight app, and have the Yeelight skill installed in Alexa and with the same Mi account as in the Yeelight app. My MI ID is: 8180681539

I’m sure I’m doing everything correctly, but the Alexa app won’t discover it.