IPv6 detection fails to function on newer Ubuntu versions (probably because of the netplan shenanigans)

[SolSoCoG]

My servers show IPv6 as down, even though it is heavily used. Running the bash client script as I no longer use python2 on the servers. Sergate runs on a raspberry pi which has ipv4/6 and displays it correctly there. Not sure if it is of interest, but the rpi's statusdomain uses ipv4 entries only.