Connecting the RGB lighting of the case to the motherboard. What could be the problem?

Question

motherboards

the original ones - the GIGABYTE X570 AORUS ELITE motherboard, the Phanteks Evolv X case
independently - everything works fine. When you try to connect a 5v cable from the case to the motherboard and turn on the computer, the power supply (not the cooler) starts cracking, the case backlight blinks and does not work properly. If you connect a 5v cable already in the process of work, then the backlight of the case starts to be controlled from the computer (but the colors are not synchronized - that is, they change in the same rhythm, but the color is different, the power supply cod is not), but after a reboot - the problem returns.
I just decided not to connect the RSL case to the motherboard, but still I would like to figure it out.