The data for the menu isn't present in the categories route, that's why nothing shows... seems odd to put menu in that route, any particular reason? People here can likely find some alternative...
Completely disable infinite scroll feature in NodeBB, i.e. configuration in ACP will have precedence over users' settings.
Just a small change to navigation behavior. Decided to share this as a plugin.
Hmm. That might make sense, maybe on plugin activate it appends to end and on deactivate it removes it