Destination location shows no files after second invocation of znapzend

[driesmp]

After unmounting destination datasets and remounting them with zfs -a my destination back-up set looks like this:

I can go in every directory and the files are mounted. I can cd into any and subsequently go to .zfs to access snapshots of the datasets.
After running “znapzend –runonce=zroot –features=compressed –autoCreation –debug”
The datasets are all "unmounted" as seen below. The datasets are still mounted but its an empty destination directory.

I can mount them again manually but after invoking znapzend it will get "unmounted" again (not showing any directories/files). Its like an empty dataset gets mounted over it at the very end or smth.

Ok so after some more testing; when destroying all destination snapshots and invoking znapzend for the first time the datasets are created and mounted and are showing files and directories. After a second invocation they are still “mounted” but no files or directories are shown in the destination location.

[driesmp]

Some extra info as maybe mounpoint/canmount properties could cause this?