OH3: OH3 looses communication with Mosquitto

Please be more specific… We can’t help you that way. So either you don’t know what MQTT does and that’s why you see these errors, or you have a wrong configuration within OH3… in both situation we need what I asked for:

  1. a proper description of the steps you took (including the configuration within OH3)
  2. the errors you receive
  3. the surrounding information on how and what you did with MQTT explorer