Razer Blade Advanced 15" screen and keyboard "breaths"

Hi,

While in game my laptops lightning "breaths". It goes from dark to bright while Synapse is set to static.
Video to big to upload here so please check my video that i uploaded to google drive: https://drive.google.com/file/d/1YYlaFzUsCsiqC8LhYuZwxZ5UwDstpmO4/view

Razor support told me to install Synapse 3 and that the problem should be fixed but unfortunately that is not the case. The issue continues.
Support also told me that i may try to reset the laptop to factory settings but i would then loose all my programs installed with special licenses...

I am now asking you, the other users of Razer products, for help on how to fix the problem?

Thanks for the upcoming answers, Nico.