I don’t know it is related or just coincidence, but when I use a third party PC app, the bulbs simply stop communicating with Yeelight and Google Home and I need to reset and sync again with Yeelight.
First time I was using Yeelight Toolbox, to control bulbs from PC. Then I installed Yeelight Music on Android, the same issue occurred. The bulbs were able to control only through LAN.
Is there an issue or just a coincidence?