Comment 47 for bug 1586528

I wonder how do you , guys, declare the bug as invalid while the issue is exists and it's still relevant.
You could at least call it duplicate with a reference to another issue, but INVALID it is not.
To the point:
This issue is relevant for me on a freshly installed Kubuntu 19.04.
I tried to use the workaround proposed by @ronny, but it doesn't look as a good idea:

sudo apt remove isc-dhcp-client Sun 13 Oct 2019 13:45:45 IDT
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  dns-root-data dnsmasq-base isc-dhcp-common libdns-export1104 libisc-export1100 libkf5modemmanagerqt6 libndp0 libopenconnect5 libstoken1 libteamdctl0 libtomcrypt1 libtommath1 libtss2-esys0 libtss2-udev pptp-linux
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  isc-dhcp-client network-manager network-manager-gnome network-manager-pptp network-manager-pptp-gnome plasma-nm ubuntu-minimal