Well, update to the update. Apparently it wasn't the "Dummy modifying some Starkey harnesses" after all, it was the diodes I got from DigiKey. I pulled the driver side harness I spliced together out this morning and plugged in the cleaner de-pinned and re-pinned harness since the spliced harness appeared to be giving me some trouble on the driver side. As a test I left the DigiKey diode in the pinned harness and tried it, and it had the same issues I described above. Pulled the diode I got from Waytek out of the spliced harness and popped it in the pinned harness and everything functions as normal, so the pinned harness ultimately was not the culprit of my issues when I first did the swap, it was those DigiKey diodes. I don't know if I got a Monday or Friday batch, or if they changed something internally, but they definitely do not work. Waytek diodes for the win!