FBA-Core : input/mapping issue - Super Gem Fighter Minimix

I have noticed that the Retropad Buttons A+B are mapped to Volume (+/-) Fight-Buttons are mapped to X+Y

All Other Games i tried are mapped correctly and work as intended. Seems to me that the default-mapping in only this particular game is bad.

my system is a intel x64 with lakka RC2.1 few Controller i tried are: XBox360 Controller, Hori Arcade Stick (FS VX) and PS4 DualShock (original)

has anyone this problem, too ?