OK Thanks, do you have a homey 2019 pro or a newer one and how many Zigbee devices do you run in your network? I simply think that 40 is too much. It can work but probably not very stable.
The heart of my network are de lidl smartplug devices.

This an animation of the zigbee map of my network, changing every second. The nodes connected to the homey are all lidl switches, except the kerstboom, it is drawn in the network, but this device is switched off.
My idea is that it does not matter at which moment they are added to the network. They are very cheap. My aqara sensors do their job fine. Also the ZBmini switches work fine. The trouble I see in the tuaya smart plug with metering. I have disconnected them. Indeed they are very cheep. They worked fine until the homey was updated. They gave me useful information about the power consumption of the heavier equipment. Now I intend to connect them to a seperate system.