If you want to make sure this issue is resolved 100% and never happens again, you should take this more aggressive step. It is easy, all you need to do is copy the following code snippet in yourΒ Divi Theme Options>Integration>Add code to the header of your blogΒ code box.
<link rel="preload" href="wp-content/themes/Divi/core/admin/fonts/modules/all/modules.ttf" as="font" type="font/ttf" crossorigin= "anonymous">