Self changing dim level

Hello,
I'm using Fibaro RGBW Controller 2 to my RGBW led strip. I have a problem because from time to time it changed dim level itself (every turning on it dim level down step by step).

it was 99%, I've turned on light - it changed to 84%, turned off, turned on - it changed to 77%, then I need to set manual again 99% and it is working for few times.

I'm using ZooZ RGBW Dimmer built in driver. It creates parent device and two children device (RGB and W). It changed level only in parent device. In children there is always 99% level as it should be. There is no rule connected with parent device.

it is getting annoying... every time when white colour is light (using motion lighting app) the main device (parent) lower the dim!