Here's the 20.04 config, pretty sure it's the same. And yes, it looks like 20.04 now clones xg's MAC to the virtual bridge interface by default. 19.10's br200, br20 MACs appear to be random. Sorry if this is inappropriate bug report.
** Attachment added: "20.04 config" https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/1945584/+attachment/5529333/+files/netcfg-20.04.yaml -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1945584 Title: netplan regression 19.10 to 20.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/1945584/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs