Lead Developer
I just replicated your header on my localhost (header image and header widget) and added that code – no line issue in Edge.
So it could be:
a) A bug in the widgets you’re using
b) A bug in your custom CSS (I’m seeing negative margin etc.. which can be buggy)
Documentation: http://docs.generatepress.com/
Adding CSS: http://docs.generatepress.com/article/adding-css/
Ongoing Development: https://generatepress.com/ongoing-development