Board Thread:Support Requests - Getting Technical/@comment-6100947-20150131191154/@comment-452-20150303002643

If you follow the steps on Help:Collapsing, then your navboxes should collapse correctly.

If your navboxes are too complex to debug/edit, then you should - somehow - reduce the complexity.

I reduced the complexity of my own navbox by splitting it into subtemplates. This made it much easier for me to make changes, and to track problems.

edit: I have not idea if it's related, but one of the scripts on that wiki is reporting an error in the console, you should probably fix that.