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If Reflect can see that the file system is NTFS rather than RAW as you saw before, that suggests that this clone is being attempted while the source volume is unlocked, whereas previous clone jobs may have run while it was locked? Otherwise, the very latest release of Reflect did include some additional intelligence pertaining to how BitLocker-encrypted volumes are restored/cloned, so I wonder if maybe that had an adverse effect on your solution?
Have you tried simply running CHKDSK /R as suggested?