Ubuntu 18.04.4 LTS, same problem: DNS_PROBE_FINISHED_BAD_CONFIG after disconnecting from MS VPN. I can confirm that workaround by Marius Gedminas from comment #30 works as expected.
Ubuntu 18.04.4 LTS, same problem: DNS_PROBE_ FINISHED_ BAD_CONFIG after disconnecting from MS VPN.
I can confirm that workaround by Marius Gedminas from comment #30 works as expected.