I did actually follow those reddit directions and for some reason the cable I made did not work. the issue I think was the amazon link to the cable changed because the color coding of the inside wires was different from the OP poster pics to the amazon product in the link for the usb c extensions. I think there is something to this PCB adapters topology that makes it work better than a cable. I have no idea why TX and RX are bound together could it be something with PD charging or android auto? I did post some picture of the PCB if those can help you diagnose the error in my diagram maybe I made a mistake and tx and rx are not bound? the traces on this board are super thin and the usb connectors were all flapping in the wind and that's why it broke I no longer have any usb ports left because they all broke off. so it was more me abandoning the pcb due to needing to not only solder the ports back but replace I think 6 traces I did not feel it would be reliable anymore.