I use HAOS with 25 zigbee devices, mostly Ikea bulbs and sensors and about 6 sonoff zbminis running on a laptop and I use a sonoff ZBdongle-E as coordinator. The version of HAOS and HA are the most up to date. I use ZHA.
After a 2 hour blackout most of my zigbee devices did not come back online even after several hours. I had to do a manual reset of the Ikea bulbs and manually delete and do a new detection for almost all the sonoff zbminis, only two spontaneously came back online after I disconnected the power for 10 seconds.
I can’t understand the cause of this behavior because in the past blackouts the devices spontaneously came back online.
The only difference of this blackout is that for 3-4 times the power came back only for a few seconds…