Do you know how to run the app from the command line using the command homey app run
? If so, could you run the debug version of Github and perform a long and shortpush about 60 seconds after the app has been started from the command line.
I have updated the debug version with the changes that are included in 3.0.12. Could you re-download and run it again and see if it gives an error.
This means the CoAP traffic is not working for this device. On startup it requests the status over HTTP REST but then relies on CoAP for device updates. That could also be the reason for other devices not updating it’s status like your Shelly 1 add on. If you have the devices in a seperate LAN you might need to do some extra configuration in your network.
You need to wait for a minute or so after running the app before the CoAP messages are being processed. Try to change the status of a different Shelly. If you still do not see any CoAP messages that there is an issue with CoAP traffic on your network.