The wiki warns to not flash the device in this order. Have you tried other way around? Sorry, I'm not sure if you've already written that. Wiki quote: "Flash always the FIASCO image first and after that immediately the latest available eMMC image, if needed. Never flash/reflash the eMMC content after you bootup the device. Reason: All the optified content that is moved from rootfs to eMMC will be lost. The eMMC image does not need to be flashed every time when a new FIASCO image is flashed. Flashing the eMMC image also overwrites all data from the internal memory card. (Notice this recommendation has changed to rootfs first, then eMMC. Except for Nokia's download page, where the comment is still wrong on that) "