As a result of this bug, /etc/config/fstab may contain damaged content, and also block mount may fail.
'block detect' reports bad uuid for /dev/sda1 (and others) mixing inside uuid of raid volume with outside of the partitions.
Bug is 'block detect' showing the same uuid for /dev/sda1 and /dev/md1 while they are different, as you can observe in /sbin/blkid output at the middle of output below.
Important: /sbin/blkid from busybox may have same/similar bug as its reporting even different uuid. The standalone /usr/sbin/blkid works properly (shown in the middle of below) and should be basis for comparison.