keyboard lighting issues

Profile: https://configure.zsa.io/ergodox-ez/layouts/K0MVl/latest/2

Default is light pink, part of the left keyboard LEDs has a weird flashing issue.
I have some other layers that have different colors, but switching to them also exhibits similar flashing lights issues.

I've tried:
1. unplugging / changing the connecting TRRS cable
2. unplugging / changing the mini USB cable.
3. Using a different computer.
4. re-flashing the keyboard

Видео keyboard lighting issues канала Cake