NAVT WordPress Plugin - Not working on index.php

Question

Hi there,

I need to move my wordpress home page onto the actual index.php file but for some bizarre reason the NAVT plugin doesn't work on there. It also doesn't work on index.php when I put it in the header.php file.

It works on all other pages as normal.

ALSO, it does work in the footer.php file when viewing the index.php file so this is what makes it all the more confusing.

Any ideas what it could be? I've disabled every other plugin so I'm pretty sure there's nothing conflicting. It's rather basic setup and I'm using NAVT default settings.

Thanks, Michael.