Hey @maatz first of all
Welcome to the openHAB Community 
But now to the finger pointing 
Thread hijacking is not nice, I see have a problem and tried to clear the cache but still did not succeed.
You won’t get many answers like this.
I would recommend reading this topic How to ask a good question / Help Us Help You 
Also your post is 14 Days old and you did not state if you solved the problem or not. And if you solved it leave a note how for other people with the same problem.