Leap 15.3 takes forever to boot/shutdown if network cable unplugged

Title says it all. Any idea why? Phoning home? Timeout set too long?

These are the times as recorded from the start of pressing Enter at the GRUB boot screen
to getting to login manager.

25sec cable plugged in
42sec cable unplugged

Times recorded from issuing <code> shutdown -h now </code> inside konsole in KDE.

5 sec plugged in
85sec unplugged

NTP daemon waits for internet to sync time. That is why.