Did not track enough (volume resize?)

[TomTomGo]

Have you tried to reset CBT ?

cd C:\Program files\UrBackup
urbctclt reset x:

Force a full image volume backup with ZFS backend

Yeah, cbt reset with cd C:\Program files\UrBackup urbctclt reset x: may help. Can you also investigate if only MFT!=MFTMirr is the problem? Use losetup --offset=$((512*1024)) to setup the volume. Then use ntfsfix to fix the NTFS error. If this is something the naturally occurs, there is already code in UrBackup to fix it…