This is a systemd/udev bug. We're aware of the CONTAINER_INTERFACE and it being wrong doesn't mean we need to change LXD to make it similarly wrong.
LXD containers need to have udevd running to function properly, so you'll need to undo that change.
If there is a bug in how udevd now behaves, that's what needs to be fixed and we can assist you with that.
This is a systemd/udev bug. We're aware of the CONTAINER_INTERFACE and it being wrong doesn't mean we need to change LXD to make it similarly wrong.
LXD containers need to have udevd running to function properly, so you'll need to undo that change.
If there is a bug in how udevd now behaves, that's what needs to be fixed and we can assist you with that.