System: Rpi 3
Version: Recalbox 9

I am having an issue with my "twin usb gamepad" (one USB board with connections for two sets of buttons + joystick) where only the first controller works, but the 2nd does not.
I believe the problem started when I upgraded to Recalbox 9.

I tried the following, although the issue did not go away:

• Changed out to a completely different USB board (same model)
• Swapped the controller slots in the configuration menu (I think this caused my MAME games to crash before even loading)
• Performed a fresh install of Recalbox.
• Reconfigured the buttons
• Rewired (swapped) buttons between controller 1 and 2
• Plugged the USB board into other USB ports on the Rpi

None of these have fixed the issue. Anyone else having the same?