Parent/Sibiling and channel question with Zigbee2MQTT

Hi, having trouble with my zigbee network.

2 stories home, about 50 devices, many wall ( powered ) aqara switches, philips bulbs, etc.
Server is a HA on dedicated NUC, with SONOFF stick - located on ground floor, near stairwell so well within a range of wall switches in that stairwell.

Wifi is a Unifi network, moved to channels 1 ( APs on ground and 2nd floor) and 6 ( AP on first floor).

I moved the Zigbee2MQTT to channel 25 via settings - restarted. But it did NOT require me to readd all my devices.

Below is my map - best i can tell performance is really poor, devices keep dropping away all over the place.
Question in particular - i expected for my coordinator to be a parent to all devices directly or at least indirectly ( parent of a parent ). However, i found devices LS.0.Kotlownia - it’s a wall switch by furnace room - wtihin direct line of sight of a sonoff - it does not link to a coordinator as a parent or a child - it shows it as a sibiling - which according to the documentation means it has same parent as coodinator ? Does that make any sense?

should i forcefully remove all my devices as pair them again to get better performance on channel 25 rather then 11 they were on previously ?

This setup is kicking my butt. Instead of inteligent home that i can more or less forget about - i have something to tinker with days on end :frowning:

Thanks for any help you can render.

Are you sure your zigbee coodinator have moved to ch25? I believe a channel change needs a re-pair. Some devices might re-pair “automatically” if you delete them first and have the coordinator in pair mode, however I do not understand you have done this?

So, maybe you are still on channel 11, or in some undefined state?

well, correction. Now i’m at 502 bad gateway error, so something did happen. Will update once i can get onto channel 25 all solid.