Steps to reproduce:
- go to a page on the navigation panel, e.g. Home ( Home is highlighted)
- click on "n more..." at the end of the current tree
- the current page "Home" is highlighted
- The "Home" page is not highlighted anymore.
- the unfolded child that was in the location of the "n more..." is highlighted ( in my case SolrLocaleFacet).
- then if you click anywhere no page is highlighted anymore.
The highlight is a slightly different color and a grey box on hover. Here by highlight I mean on the text color on the current page from the navigation panel. In order to better see this issue some theme work better than other.