Yes, that does look like a bug, so I have transferred it ti the bug section. Thanks.
Not related to any particular individual though, as I have been able to reproduce it on my own data, rather it appears to be a failure to fully connect some more complex lines.
Might be hard to trace, but it will be a high priority for me as I use this a lot.
Trouble is, I don’t remember actually changing any code in this area. but we’ll see. Memory’s not what it used to be 🙂