Solved! 
It was ws2812 driver. Removing it helped.
Thanks everyone for helping me 🙏 
Especially thank you [manize ](https://www.reddit.com/u/manize/s/2uAnWGHnC0), for finding it in qmk documentation.
[the project ](https://github.com/Aghrezar/My-humble-start-with-split-keyboard-/tree/Humble-start) was updated.
 
Now i need to dive in cad modeling )