Is-sticky class not added when browser < 1024px

When my browser is narrower than 1024px wide the .is-sticky class doesn’t get added.
Where could I enable the script that adds that class so I could get it working on all browser sizes?

Thanks!

Hello, try to use the following CSS code.

You can add CSS code in Customize → Additional CSS section.

@media (max-width: 1023px) {
    #masthead {
        position: fixed;
    }

    #content {
        margin-top: 92px;
    }
}

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.