Hi,
I recently also ran into some issues with about 18 Zigbee devices directly connected to Homey 2019 not responding or not able to connect again after removing them. My Zigbee network had to less routers which might cause some stress in my Zigbee network. I installed a Ikea Signal Repater which came with my Fyrtur blinds which resolved the issue. My Zigbee devices are responding better and I was also able to connect (new) Zigbee devices again.
- Check in the Homey Developer Tool how many Zigbee devices act as a router in the Type colum.
- Check if you may have interference with the WLAN at this website.
I got some information from Homey Support
The IKEA hub is not needed because you are still way below the maxium number of Zigbee devices Homey can stably support, which is between 30 and 40. The problem is that you have too many end devices and too litlle Zigbee router devices. The devices on your Philips Hue Bridge are not part of the same Zigbee network and can not strengthen the network of the devices paired directly to Homey.
