Comment # 60 on bug 1094762 from Franck Bui

(In reply to andreas bittner from comment #56)
> Created attachment 771834 [details]
> journalctl -b output while still running zypper dup, systemd trouble around
> 15:17+ timestamp onward
> 
> journalctl -b output while still running zypper dup, systemd package became
> installed and then troubled around 2018-05-30 15:17+ timestamp onward
> methinks.

Sadly the log level is not kept/saved by PID1 when it is re-executed.

IOW your logs don't provide more info than the ones already provided.