@ministry said in Settings not persisted after power loss!:
Everything works great, but I'm experiencing an annoying bug: some settings are not persisted after a power loss.
Yanking the power out from the Pi without properly shutting down the system can cause filesystem corruption or sd card damage, which can lead to unexpected results, including symptoms like you described.
From the settings you mentioned, only custom collection settings are EmulationStation specific, the rest are emulator configurations, which should be written/persisted when you exit the game. If you shutdown properly, does the issue still happens ?