I have a very strange experience. I have a RP4 2GB booting and running from an SSD (no SD) using HassOS 5.4. It all works flawless from wifi setup, HA and updates through to HassOS reboots and HA restarts. But… as soon as I remove the power unit (after clean shutdown) the wifi cannot connect anymore and see:
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
I tried the nmcli option to reconnect but without luck.