Nested tabs are not working

The reason it is failing is from this behavior:

Drupal.behaviors.quicktabs = {
    attach(context, settings) {
      $(once('quicktabs-wrapper', 'div.quicktabs-wrapper', context)).each(
        function () {
          const el = $(this);
          Drupal.quicktabs.prepare(el);
        },
      );
    },
  };

The nested content is 'div.quicktabs-wrapper', so its not checked here in the context. We either need to wrap the content in another div container, or remove the context from the once statement so it checks everything.

My MR removes the context since that was the simplest, but not sure which approach you would rather.