Well i think i found the issue. but BOY! those input fields are not User Friendly
All the time cursor jumps to end of the text.
I had to use the LEFT SHIFT (and i used the right shift)
Also it’s not possible to drag those tags to the right place in the text. but that’s a different issue.
For now i found the problem and fixed it with using the LEFT SHIFT 
Thanks @robertklep for pointing out the Shift method!
But i would like to see better also a json string in the headers.
