What might cause scrolling on mobile to stop after clicking on window to close hamburger nav?

On the mobile version of our site when you click the hamburger menu (which is an anchor tag) it opens and closes just fine if you are using the hamburger menu button. Otherwise, if you try closing it by clicking off the menu or on the window, it closes but then will not scroll unless you reopen and do it again.

Any thoughts?

Just using basic js and jquery to show/hide nav when clicking the or a link in the nav. clicking on a link or anywhere that isn’t the hamburger button causes scrolling to not work until you open and close nav again.