I cannot find anything on the logs that points to the problem. I have searched every topic here, but nothing that resembles that. I´m thinking about detecting when anything goes in this state and restart zigbee2mqtt somehow.
Sorry if here us not the appropiate place or if my english is poor, I normally wouldn´t post anything, just read but I´m running out of ideas.
It might not be anything inside network that cause it.
It could be some device you have in the house that emits electrostatic noise and kills the network.
It can be a pump to the heating that starts at that time. It can be the boiler, even if it is a gas boiler, then the boiling of the water can cause vibrations in the boiler that then transition into electrostatic noise.
Look around and see and if you leave near neighbors, then it might be their doings that cause you issue.
A change in channel might solve it, but you also don’t know what else you might end up in on the new channel you select.