I have about 30 hue lights and sensors that are connected to the hue hub. Resently the integration to Homey has been giving problems. It stops working perhaps once or twice a week. All the lights are not working in Homey app and the flows that uses any of the lights also stoppes working. If I restart the app, everything works fine.
I also have this, but it only happens when either the Homey is restarted, the AP is restarted or the Hue bridge is restarted. You can make an Advanced Flow:
Every 10 minutes (trigger)
Hue light: Is on (condition)
Connect the error point of the condition to the “Restart app Philips Hue” action from the System category (you need to enable the power user experiment in More→Settings→Experiments)