Strange ! All original joycon not working , all fakes Working ! Any ideas?

I’ve got a very weird behavior on one Oled switch that came in for repair.
All my Nintendo right joycons (originals) are not working (i tried several ones and on my Oled they do work fine).

All “fakes” right joycons do work fine on this switch, i tried 4 different pairs in total.

I replaced both console and joycon rail but it didnt help.

I would appreciate ALL crazy direction to dig in as it is a real mystery for me :slight_smile: