Yeelight Color Bulb auto change to blue after sometime

I notice after some time my Yeelight color bulb become blue.
I have reset everything and this happens to 2 of my bulbs.
I set it to any color and when I go elsewhere and return the bulbs turn blue.
Is this a bug?
Everything is reset and my phone yeelight is untouched so what’s causing it to turn blue after a period?

Check if you have setup a schedule or some other automation, for example IFTTT applet.