Note: the if the solution needs an ifupdown hook like shown in comment #12 in >=Bionic I'd ask you to take a look for networkd-dispatch (the final solution for almost all of these bugs is that the upstream project starts to listen o netlink to pick up late ready IP addresses)
FYI: There seem to be a whole class of issues like this so Rbasak added it also to a card that tracks related work.
Note: the if the solution needs an ifupdown hook like shown in comment #12 in >=Bionic I'd ask you to take a look for networkd-dispatch (the final solution for almost all of these bugs is that the upstream project starts to listen o netlink to pick up late ready IP addresses)
FYI: There seem to be a whole class of issues like this so Rbasak added it also to a card that tracks related work.