I am using PS2 controlles which work perfectly on all systems. For some unknown reason, in some NES games (e.g. Antartic Adventure and Contra; emulation through the RetroPie standard NES emulator), the controller drifts left automatically, and can only be turned right by holding down the right pad key. It only happens for some ROMs, although I downloaded different versions of said ROMs but the same problem remains.
I am completely puzzled. I couldn’t find any help around in any fori. Has anyone faced the same problem, or something of the sort?