Remove bogus DNS from resolvectl status

I use openconnect to join a VPN. On disconnection, the DNS remain alongside with mine in Global section, which causes a delay in network queries : Global Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported resolv.conf mode: foreign Current DNS Server: 172.29.183.69 DNS Servers: 172.29.183.69 172.29.183.70 192.168.100.144 DNS Domain: groumpf.org in.company.fr Link 2 (enp2s0f0) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported Link 4 (wlp3s0) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported Link 5 (docker0) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported Link 6 (vmnet1) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported Link 7 (vmnet8) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported Link 9 (enx482ae3a900cd) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported groumpf.org/192.168.100.144 are my correct domain/DNS, while others are remnants from tun0 wich is actuallay down. The system is Ubuntu 21.10 (kinetics) and openconnect is 9.01. Is this a systemd or an openconnect problem ? Regards, Xavier