Responsive Breakpoint Not working

I set the Responsive Breakpoint (Located Mega Menu > Menu Themes > Mobile Menu) to 980px for the menu to switch to a mobile menu, but it doesn’t switch to a mobile menu until 882px.

I chose option 2 in the Max Mega Menu Documentation (https://www.megamenu.com/documentation/divi/)

I’m using the Divi Theme and WordPress 4.9.5. All other plugins/themes are up to date and I have also tried disabling all other plugins and themes to see if there was a conflict, but no luck. Is there something I’m missing? Thanks

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