Hi, @Grommish , I encountered the same issue with the same rtl8367rb chip, on a hiwifi r33 (aka. c312b, or b52).
I confirm that my rtl8367rb chip has chip num 0x6367 and chip ver 0x0020 just like yours.
It may seem a bit odd, but for now I solved the port0 not working issue (no cable detection) by skipping writing of initvals altogether.
I didn't bother to check how it caused the issue as even if we narrowed it done to just exact one bit of register setting, lacking proper datasheet doc there is no way I can discern the meaning whatever.