This is probably because of conflict with our AJAX page transitions and some 3rd party plugin which you are using. Page transitions create nice effects when navigating through website. When transitions are turned on, header and footer are not reloaded, only content get reloaded. This can cause issues mostly with some plugins (or scripts) because they demand their scripts to be loaded in header or footer and they are not. If you happen to experience this later on while you are developing your site, note that first thing to do is to turn off page transitions.

Page transitions can be turned off from:

1. general options Qode Options > General

2. local options (when you edit your pages), note that these settings will overwrite global settings from Qode Options for specific page

3. Also you can turn off page transitions for specific pages by writing page URLs from Qode Options > General