RetroArch compatibility error with multiple controllers

[rb0022]

Game will start (GoldenEye: Rogue Agent) and has option for multiplayer (GoldenEye Splitscreen menu selection) with up to 4 controllers, which use simpler static maps that may be more playable than campaign. However the additional controllers are ignored:

• Quick Menu > Controls > Port 1 Controls has Device Type selectable as RetroPad or PS2 DualShock 2, with Mapped Port 1 and all buttons mapped correctly
• Quick Menu > Controls > Port 1 Controls has Device Type selectable only as RetroPad, with Mapped Port 2 and all buttons blank ---

Behaviour not witnessed in any other RetroArch Core (e.g. NS64) where both controllers are correctly recognised immediately.

Setup:

• RPi5
• 8BitDo SN30 Pro
• Lakka with RetroArch Cores, PS2 Play!
• Using SLES-52974 (using glcore or vulkan only), as SLUS-21064 would not open with PS2 Play!

Reference:

• https://github.com/jpd002/Play-Compatibility/issues/1924
• http://redump.org/disc/6751/
• http://redump.org/disc/4109/