Spirit tablet mode menu items can't adjust.

When I try to edit the menu section of the spirit theme in the tablet view the menu items won't adjust without freezing the system. I was trying to change the responsive button to a full menu for the tablet mode and hide the social icons. Whenever I tried to move the social icons, or drag the menu selection to be wide enough for the items, the screen grays out. It is a light gray with everything behind it. The item I was working with then disappears.

I have not noticed this anywhere else.