Emulator

Between versions 5.0-14559 and 5.0-14562 something changed in the Gecko code handler that resulted in an important code I created for a game to break. The code is executed fairly early, which is why I'm guessing the issue is.
The game is Bakugan Battle Brawlers [RUHE52] and the code is
c20722ac 00000002 3860000f 907f0010 7fe3fb78 00000000 04072108 38800002

The code should skip the opening wii remote splash screen, as well as most menus. After and including 5.0-14562, it fails to skip the wii remote splash screen, which is critical for netplay functionality, as the game disconnects non-player 1 wii remotes at this screen, breaking Dolphin's netplay entirely.
This isn't really a game specific issue either, but this is just an example of one immediately affected game.