Try disabling dualmode on your wifi system.
Homey (and lots of wifi ebabled domotica stuff) doesn’t like 5GHz combined with 2,4GHz; so if possible, use a 2,4GHz SSID for Homey.
With the Net Scan app, you can monitor your wifi router f.i., and let it log on/offline statusses, or even restart Homey.
Something like:
