while i was trying do add some breadcrumbs to my site using the recommended "breadcrumbs navxt" plugin i discovered that there is a small gap between the navbar and the breadcrumbs on small devices (tablets), when the top bar is disabled as you can see in the picture:
I found out that it works perfectly on desktops and smartphones, as well as it works on all devices when the top-bar is enabled, but as mentioned not on tablets when the top bar is disabled.
It seems that the gap is also visible on the frontpage between navbar and slider:
To test this behavior i did a fresh install of latest wordpress 4.7.2 with franz-josef 1.7.4 and the latest version of breadcrumbs-navxt. You can have a look at my test-setup at: http://onewang.bplaced.net/wordpress/
I think that this is a bug, but as I'm not sure what's wrong I wanted to report that to you and would really appreciate your answer.