I’ve had this issue on the EU servers for quite a while, it has increased a little over the last 2 months. If you need some logs etc, just let me know what you need and how i can help you investigate what is causing this. It doesn’t seem to be disconnected in homey, untill you click the device. You can just connec again and then everything works fine, sometimes it happens once a day, sometimes 3-4 times a day.
In some cases, after i reconnect, i don’t get the login screen but still seeems to be connected again, although i’m not (flows etc don’t work). If i disconnect and reconnect, including entering password) everything works fine again
Let me know if you need some help testing 
