That did not help unfortunately. I also deleted the Dugi Addon (and its settings from the WTF folder) and did a fresh install, the problem is still there, also testing with another character has the same problem.
And when testing around I found I get one extra line every time I switch the Addon to “Off Mode” and back to “On-” or “Essential-Mode”:
In this case the 4 extra lines disappear again after a UI reload, but even after that I still end up with 2 lines.