Blobs might be incompatible. {...} Or see the content of the factory reset script inside the recovery {...} I seem to vaguely remember that the factory-reset needed to also flash a few blobs into the special purpose partition (all the other beside mmcblk0p28)
mount -o subvolid=0 /dev/mmcblk0p28 /mnt mount -t proc proc /mnt/@/proc mount -o bind /dev /mnt/@/dev mount -o bind /sys /mnt/@/sys chroot /mnt/@/
/var/lib/platform-updates/