Just to give a quick (and promising update)
Maybe this is not a good news for you, but at least can give one idea for you to troubleshoot.
Here instead of this HUB, I'll change for 2 slipters one for each header. let's see if helps.
One more update for the Topic here.
Before I unplugged the cable (that was very well connected) turned on the PC, and tested the Back USB3, and it worked. Turn off the PC plugged back the NZXT hub, turn on the PC and I posted here the results.
Now just as a part of troubleshooting, I tested the USB3 on the back again. And it is working now!!! Even with the NZXT plugged in.
hahahahaha Unfortunately I still need to deal with this matter:
No idea if it is related to GPU or Motherboard. But it's for the other topic discussion hahahaha