I found several topics with similar issues, but they were not that helpful (restart HA, use wired connection, buy a new router, get better signal, ping google and restart HA with an automation).
My HAOS Pi4 uses two network interfaces, wired and wifi, and both are active to connect devices in different networks. The wifi interface has a static ip, WPA2, etc. Usually every thing works fine.
But sometimes when the wifi router was not available (due to whatever reasons) the wlan is not reconnecting once it is available again.
SSHing into the system, over wired, of course shows
Wired connection 1 ... ethernet eth0
my-network ... wifi --
If I just type
nmcli c up my-network
at that point the wifi reconnects and everything is fine.
Any ideas why it does not reconnect on its own?