Comment # 5 on bug 1017160 from Kristyna Streitova

Upstream confirmed that running multiple 'cron -n' processes is an intended
behaviour:

<cite>
Yes, there is nothing that prevents you to run multiple 'cron -n'
processes, although it is not so much useful as it would make the
crontab entries to be also executed multiple times. As the 'cron -n'
original and main purpose is debugging it actually makes sense though.
</cite>

As we are not able to reproduce it on Tumbleweed anymore, I would suggest to
treat this issue for SLE12/Leap only for now.

@maint-coord: Can you please add this bug to the list of the planned
maintenance updates for SLE12? Thanks!