Comment 7 for bug 1956213

done an unofficial backport on my ppa (https://launchpad.net/~fantonifabio/+archive/ubuntu/backports) of 1.6.9-2 (not yet released) for ubuntu 20.04
if lan6_conf will be confirmed as working I'll upload 1.6.9-2 to debian unstable, later it will also be taken by the next version of ubuntu.
I don't know if I'll try to do a possible official backports (or stable proposed update with only patch) for Focal, as I saw for other fixes for cinnamon and nemo can require a very long time, we will see later.