Colour Bulb 1S keeps disappearing from Yeelight app

My bulb gets added to the app successfully but within seconds it disappears from the Yeelight app.

It can subsequently be added to Apple HomeKit. And later even the app Yeelight says it successfully added device from HomeKit and yet it doesn’t appear in Yeelight app.

The issue is with yeelink.light.color8
I have color2 bulbs which are working fine

Hello, look at the problem description like the device and server selection does not match, which server did you choose?