avahi-daemon not restarting on restart of computer

[drmikecooke]

This may be due to recent apt upgrade but I've noticed I've not been able to contact other headless rpis through their hostname without restarting avahi-daemon.

I've traced the problem to the system thinking that avahi-daemon has been continuously running when the system (rpi4) has been powered off. I guess during powerdown it doesn't make a suitable note who knows where and thinks it doesn't need to restart the process on powerup.