Mobile Menu Overlay Issues

Hello, I’m having an issue with a client site.  We’re using the theme Sweets Peachy.  I have not made any customizations to the mobile menu, but it appears as if the background color is missing.  When you select the menu dropdown on the mobile rendered site, the text overlays right ontop of the logo, making the website look very messy.  I’ve attached a screenshot below for review.  I’ve looked into the css code multiple times and haven’t found any errors or been able to come up with any solutions.  Can someone please help me out?