Hi,
I just read the upgrade news here: https://docs.unraid.net/unraid-os/release-notes/6.12.8/#upgrade-notes
Which says this:
"Note that some users have reported issues with port forwarding from certain routers (Fritzbox) and reduced functionality with advanced network management tools (Ubiquity) when in ipvlan mode. If this affects you, see the alternate solution available since Unraid 6.12.4"
But as you can see, the link (https://docs.unraid.net/unraid-os/release-notes/6.12.8/6.12.4.mc/#fix-for-macvlan-call-traces) is not working