Comment 3 for bug 1777348

The newer versions already avoid that by no more being after mounts, only in between network-pre and network.

Wants=network.target
Before=network.target
After=network-pre.target

The subservices (bgpd, ripd, ...) are all integrated after zebra in between the same to network-pre/network and bind start/stop to zebra itself
BindsTo=zebra.service
Wants=network.target
After=zebra.service network-pre.target
Before=network.target

That said the issue you mentioned is fixed in newer releases as you assumed.
So let us look at the older releases.

Changing the dependencies of these releases now - as outlined there are cases that can need that - will be too much regression risk.
Suggesting a comment in the config/init is a nice suggestion, but IMHO not worth to ship an update for through the SRU policy.

Instead of a comment change in the old release I'd personally personally think this bug is already good (as it can be found by search engines) - maybe one should write a good askubuntu entry about it?
That would probably be read more often than the comment in the init file?
Opinions?