Fire Emblem Fates Special Edition Region detection

Thought I’d post this here instead of in support as I’ve technically solved the problem for myself, but it could still be seen as an issue.
Fire Emblem Fates Special Edition, despite showing as Region Free in the library view, requires the system’s region to match its own for DLC to work. If they are different, the DLC will not be available at all in the main game, giving the error “Could not detect an SD card” when you try to play it.
Setting Citra’s region to Auto-Detect doesn’t work properly, you have to set your region manually (Or at least I did for EUR, I assume it’d default to USA).
Is this a bug? Or is there no way to tell the region on an FE Fates SE game?

Or is there no way to tell the region on an FE Fates SE game?

That’s the most likely case, the same goes for some Pokémon games iirc

Ah. I guess there’s no way of fixing it then. Any problems that could arise from running Citra set to EUR all the time? I have a few USA dumps, does it disable region locking?