I am trying to play the english translation of Fire Emblem 6 with RetroArch 1.8.8 on the mGBA core, but everytime I play the Wii U just completely shuts down out of nowhere after approximately 10-15 minutes of play. I am on the latest firmware and use Haxchi. The problem persists with both the RetroArch Launcher and Homebrew Launcher rpx. Maybe I turned on or off a wrong setting? I got 30 minutes of play in the game a few days ago with no problem.
EDIT: I tried playing Oracle of Seasons with SameBoy Core, same thing happens. I know it worked before, especially with that game. I will try deleting my configuration and reinserting assets.
EDIT2: Deleting and reinstalling retroarch fixed the issue. Btw the Forwarder sucks, shuts down the console everytime I try to change cores or exiting Retroarch. I suggest sticking with the HBL rpx.
I use the forwarder and have no issues, but I have noticed that if you turn off a controller by pressing the power button the console will shut down when exiting or changing cores.