HA on RPi3b+ do not boot without LAN (HA KIA on a every electricity shortage)

I just found out that where I have moved there are regular power outages. Every time the service returns my RPi start before my router can be ready. When this happens HA does not start. It forces me to manual reset the RPi. Is this normal?

What could i do?

I’m afraid it will happen when I’m traveling and can’t restart it.