hi piper,
thanks for the input so far!
the cosmetic issue on my end actually is having a negative effect: the network manager target is deleted/killed to break the order cycle, thus i end up without network on my desktop.
i have for test purposes deactivated the /etc/fstab entry of my NAS mount, and the issue is gone!
now i need to figure out, how the hell on earth the fact of network mount generates a cycle...
any ideas?