Partitions in fstab immediately unmounting

Have just installed Tumbleweed, and tryig to mount a number of partitions from fstab on boot, and it appears they are mounting, but then immediately unmount.
Root partition is BTRFS, and others are Ext3/NTFS.
Have found a couple of ‘mentions’ of this happening, but no reasons/solutions.

There’s an older bug report:
Bug 1137373
I’m not sure whether that is relevant.

Yep, still unresolved, apparently.