Hmm, I'm sorry, but it's still mixing up v4 and v6...
$ sudo ./airvpn -N off -i -6 yes IPv6.ovpn
AirVPN OpenVPN 3 Client 1.0 alpha 2 - 7 November 2019
CONNECTING...
Starting thread
Thu Nov 7 18:28:12.805 2019 OpenVPN core 3.3.2 AirVPN linux x86_64 64-bit
Thu Nov 7 18:28:12.809 2019 Frame=512/2048/512 mssfix-ctrl=1250
Thu Nov 7 18:28:12.812 2019 UNUSED OPTIONS
3 [resolv-retry] [infinite]
4 [nobind]
5 [persist-key]
6 [persist-tun]
7 [auth-nocache]
8 [route-delay] [5]
9 [verb] [3]
10 [explicit-exit-notify] [5]
18 [pull-filter] [ignore] [dhcp-option DNS]
Thu Nov 7 18:28:12.812 2019 EVENT: RESOLVE
Thu Nov 7 18:28:12.813 2019 WARNING: Network filter and lock is disabled
Thu Nov 7 18:28:12.813 2019 Contacting [2001:ac8:20:2b:fbca:14fa:873e:4051]:443 via UDP
Thu Nov 7 18:28:12.813 2019 EVENT: WAIT
Thu Nov 7 18:28:12.813 2019 net_route_best_gw query IPv6: 2001:ac8:20:2b:fbca:14fa:873e:4051/128
Thu Nov 7 18:28:12.813 2019 sitnl_route_best_gw result: via fe80::9a9b:cbff:fe6d:a378 dev enp35s0
Thu Nov 7 18:28:12.813 2019 Thu Nov 7 18:28:12.813 2019 EVENT: DISCONNECTED
connect error: ipv4_exception: error parsing IPv4 address '2001:ac8:20:2b:fbca:14fa:873e:4051' : Invalid argument
Thread finished
STATS:
Profile is the same.