I found something strange again.
Which is really sad, because there are AND / OR Logic Gate nodes for Node-Red which need a Topic.
Listens to state changes of a selected openHAB Item.
https://puu.sh/wOnkJ/ccecbc7cf8.png
https://puu.sh/wOnlp/abb8c77ead.png
BUT! If you look into the Debug log of the outgoing MSG there is no topic.
The bottom Node with “MyTopic” is a simple injection to compare a msg.payload with a topic.
https://puu.sh/wOnq0/805d1ee408.png
https://puu.sh/wOnsY/11b678dfed.png