I have the latest version of YSMenu with the latest version of the official firmware without the fake killer (1.17). Whenever I try to load a GBA game with my expansion pack inserted, it says "No flash cartridge in slot 2". Also, rumble doesn't work in games that support it because the games don't even detect a rumble pack. Also, whenever I load gba games with the GBA ExpLoader, they work, in both PSRAM and NOR Modes. However, the RAM and rumble modes don't work (though it does shake after I choose one of the rumble modes and soft reset).