Yealight RGB v2 Lag

Just bought 3 of these, set them all up brillaintly, created a group, all worked fine. Now there is one bulb that lags, when I do a group command its about 1 sec behind the rest, tried to factory reset but no joy…

Reset can’t work with the latency, it’s network related. How about enable LAN mode, and set your phone use the same wifi as the bulbs?

I dont think its the network, all the rest of the bulbs work fine. I use the API with lan control and they all work as a group then, just using the yeelink app