When we control a device from the alexa app, the alexa app shows "Device is unresponsive". However, we receive the directive and reportstate requests. We also reply to the resportstate properly and the Alexa app shows the updated state for the device.
So everything is actually working properly. But the "Device is unresponsive" message is still shown.
Skill ID: amzn1.ask.skill.eecf4a77-ea81-47e0-98ac-b0152fd00673