YeeLight suddenly lose connection

I’ve been using Yeelight Lights for the past 1 years. In total I’ve 6 Yeelight connected to my GoogleHome and Yeelight App.

Out of a sudden, 4 of the Yeelight stopped working (after 6 months or so) and no matter how many times I reset the lights, it won’t last for more than 1 day (Both on GoogleHome and YeeLight App)

Yeelight Ceiling 24 x 2 - This is perfectly fine
Crystal Pendant Light x 1 - This is not fine
Yeelight Ceiling 320 x 3 - This is not fine

Can anyone from YeeLight help ??? I’m on Singapore Server

hey, quick check. Is anyone from Yeelight able to help with this issue ?