Mesh bulb m2 is no add to one group

Hello all

there are Mesh M2 bulbs from Yeelihgt are connected through the Yeelight gateway and are eaten in the group. 9 pieces worked as one light bulb in the hall and 4 pieces in one in the kitchen. Alice was also controlled, albeit with an error, but turned on and off at the same time. Last night, all the bulbs from the group fell out and are not added again, not in the Mi home program, not in Yeelight. Individually, each light is turned on and off, and the group is not united, I don’t understand what happened.


guys really no one has such a problem ?? try to unite the light bulb mesh into one group ??