I did a CTRTransfer to region-change my EmuNAND to Eur, and after I did that, I could not load the EmuNAND from Luma. I have a N3DS on firmware 11.5.0-38U, B9S 1.3, and Luma3DS 8.1.1.7
Edit: I booted while holding up, and after that, it works fine, even though it was always at autoboot EmuNAND