K1cked

I have been messing around with a problem that I can’t seem to figure out. I followed the wiring diagram for the fans with the commander pro. The issue I’m having is that I have 4 fans plugged into the rgb hub which plugs into the commander pro. All 4 fans spin fine but under icue I have to select 6 fans for all the rgb to work. If it’s set to 4 fans the 4th fan doesn’t light up. Any ideas?