JS not loaded with shortcode

The JS appears to be loaded because it shows in the source code but it’s looks like something is being blocked somehow. There are no errors in my console or in my logs.

I have deactivated all plugins (that I could without the basics stopping to work) and removed all js, which I think could be involved.

There’s 1 js file which I can’t remove/deactivate since the change password form is shown in a js dependency.

This is the js I use (to create tabbed content):

function openTab(evt, tabName) {
    // Declare all variables
    var i, tabcontent, tablinks;

    // Get all elements with class="tabcontent" and hide them
    tabcontent = document.getElementsByClassName("tabbed-content");
    for (i = 0; i < tabcontent.length; i++) {
        tabcontent[i].style.display = "none";
    }

    // Get all elements with class="tablinks" and remove the class "active"
    tablinks = document.getElementsByClassName("tab-links");
    for (i = 0; i < tablinks.length; i++) {
        tablinks[i].className = tablinks[i].className.replace(" active", "");
    }

    // Show the current tab, and add an "active" class to the button that opened the tab
    document.getElementById(tabName).style.display = "block";
    evt.currentTarget.className += " active";
}

I did notice there’s no js/no-js added to the body class of the page I’m showing the form on. Does that matter ?

Issue is not resolved, but I’ve changed the setup to avoid this issue.