To reproduce:

1) Download and open project
2) Open "DefaultScene" scene
3) In the Hierarchy window, select IntroSequence/panel_01/LabelAnchor/Label
4) In the Inspector delete the "Panel 1 Text in English" text and enter random letters until the word fills the label width and jumps to another line
5) Enter Zero-Width Space in the middle of the word (This can be accomplished, by using http://htmledit.squarefree.com/ just enter <p>a&#8203a</p> in the editor and copy the output to the label text field)
6) Notice that the word doesn't break where the zero-width space should be