With the next diagram, the link between the root and the first level is missing, and the first level box on left is not displayed
@startwbs test
+ root
+ level 1\nright\nwrong upper link
+ level 2\nright right
+ level 3\nright right right
- level 3\nright right left
- level 2\nright left
+ level 3\nright left right
+ level 4\nright left right right
- level 4\nright left right left
- level 3\nright left left
+ level 4\nright left left right
- level 4\nright left left left
- level 1\nleft\nThis is missing
@endwbs