How to avoid unneeded extension lines?

Thanks dave…
Yes, that was (part of) the problem. But i don’t actually remember to have ever changed that setting, i would have thought that was the default ones.
So for anyone else looking for that post with the detailed solution, it’s this here:

But for the post- title, i still would expect LO to reduce the extension lines to zero if they are not needed. Because in the example in the gif, even with the extensionline end arrow only 2pt, it still extends into the chimney, and i have to move it manually.