Blank TOC Links
This is very difficult to duplicate. It is really only possible using an addon that would insert additional sections into the article and also add these to the TOC for that article. And this is only possible if the main body text does not have ANY sections of its own. The article would have to force the TOC, or the addon would have to add enough to trigger the TOC to be created.
The result is a TOC that is twice as long as expected, with the second half being links with no text (just the section numbers).
Fixed for the next build. This is caused by VaultWiki checking only one array for values when it means to check both, resulting in empty values from one.