Insure -- Responsive landing page

A couple of things I couldn't figure out that I would appreciate feedback on:

1. If the header nav menu has been opened and closed, then it kind of appears and quickly disappears whenever you resize the window. I'd like to know if this is really a problem and if so, how to fix it.

2. I used the background image property to set the background pattern in the nav menu. It worked fine until I moved all the images into the dist folder. I rewrote all the src destinations in the <img> tags, but this was the only image that I accessed through SASS. I'm not sure now how to make sure it renders.