My yeelight color bulbs turn on automatically on their own

I have an issue with my Yeelight color bulbs that appeared about one month ago : they turn on automatically early in the morning despite having no schedule or automatisation. I’m on the Francfort based serveur and my MI ID is 6169623273.
If someone could help me with my issue i would appreciate that a lot.

Try from the settings of the blub to enable the default state

I tried that already but it didn’t do anything… They all turn on simultaneously in the morning.

Do you face any power outbreak? Normally if you enable the default state should remain off if the last state was off.