Building a stable Zigbee network

After a few years of using my Homey (pro), I’m going to take the time to set up my Zigbee network from scratch and also to clean up flows. Yesterday I bought a Gateway Hub from IKEA: I’ve been using about fifteen TRADFRI devices without the hub for a few years, not always without errors or devices disconnecting.

What would you advise me: add all end devices like bulbs to the Gateway hub first, and then to Homey? Or: add all devices directly to Homey? For example, does it still affect the processing power of either device?

Zigbee devices can only be connected to one controller, so either the Tradfri hub or Homey, but not to both at the same time. Each device (Tradfri hub and Homey) create completely separate Zigbee networks.

I had (also) some problems with my zigbee network and bought this:

Now everything is perfect!

Where talking about zigbee,. The repeater is zwave
2 different protocols