This is still an issue with the now-current systemd-210-43 package. Testing 66 VMs, 24 of them still on systemd-208-45, I see the abandoned scope units on pretty much all VMs with systemd-210, and on none of the VMs with systemd-208. The issue is clearly related to cron - on the few systemd-210 running VMs where I practically don't have cronjobs, the issue does not show, and the rate of occurrence increases with the cronjob density. So far I cannot identify any adverse affects of the issue, except for the display of the abandoned units, but this makes me nervous....