Dolphin detects an unknown extension on a real wiimote with integrated motion control

[Nilz203]

Hello dear Dolphin enthusiasts,

I've been trying to find a solution for some apparent bug, Dolphin detects a unknown extension even though I have nothing plugged in.
All I have on this WiiMote is integrated motion controls. I don't know if this bug has been covered as it does not come from my controller, I verified on my Wii and it detects the motion controls and no extension.
I have linked a photo for some proof.