Yeelight ceiling light - sunrise in 0.1 second

Dear Staff,
I have a yeelight, and i use this great function (sunrise) in the morning. Works well, but sometimes (once a week) the sun rising up in 0.1 second to 100%, which is very annoying at morning. The log says the task ran succesful, the trigger time is correct too. I have deleted all the automation tasks, deleted the lamp from Mihome, then reconnect it and redo the automation, but the error still occures one times a week (not on the same day). Do you have some suggestions how to solve this problem?