[the_other_guy]

Same issue here.
When creating a new main menu item, and then adding widgets to it, navigating to other rows in the widget view is impossible. Only going right and left in the first row works.
It works when I add widgets to main menu items that I created some weeks ago.   

If you look at the XML for something you created before that does work, and the one you created now that doesn't, is there anything obviously different?   

I already tried that, but was not sure which files to look at. Any hints? 

addons\skin.estuary.modv2\xml
script-skinshortcuts-includes
what is sounds like is the widget list id and "group" id= do not match

<control type="group" id="5000">
                    <visible>String.IsEqual(Container(9000).ListItem.Property(id),movies)</visible>
all widgets would need to start with 5***

https://forum.kodi.tv/showthread.php?tid=344593