in The7 Theme, Does not work well….

I test google maps ready! plugin.
http://map-1.esy.es/road/
I use the7 theme and wordpress 4.0.
http://themeforest.net/item/the7-responsive-multipurpose-wordpress-theme/5556590?ref=nanook44&ref=nanook44&clickthrough_id=267465332&redirect_back=true

You can see example site.
In The7 Theme, maps not appear about 90%.
In Other themes, Map display well.

https://wordpress.org/plugins/google-maps-ready/