This is definitely not a bug. The problem is that now when the Mega Menu is responsive you need to add you custom topics in one more view - the responsive view. Please note that the changes need to be made in the views(.cshtml) files within the Themes\Alfresco\Views folder of the Mega Menu plugin. Please refer to this post as we have already explained it for the Jewelry theme but it is analogous with the Alfresco theme.
A few suggestions to make your site looks even better.
- increase the picture size in your JCarousels to be 200px rather than the default 125px.
The size is managed per Carousel when you go in the administration and edit its settings.
- increase the picture size of the categories to be 300px for example, so that it will look much better i.e home page categories.
You can also update the theme to the latest version as we have added a lot of bug fixes and improvements.