Dropdown menu missing?

Question

Joomla

Registered on the site through html using bootstrap 4 the main menu with a drop-down. When you select a drop-down, it disappears if you poke in another place or on some of its sub-items. What to do to prevent this from happening?

<li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          О нас
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="http://cw68466.tmweb.ru/index.php/o-nas">О компании </a>
          <a class="dropdown-item" href="http://cw68466.tmweb.ru/index.php/otzyvy34453534">Отзывы</a>
        </div>
    <li class="nav-item active">
        <a class="nav-link" href="http://cw68466.tmweb.ru/index.php/kontakty">Контакты</a>
      </li>
    <li class="nav-item active">
        <a class="nav-link" href="http://cw68466.tmweb.ru/index.php/izbrannoe"><span class="oi oi-star" title="star" aria-hidden="true"></span>Избранное</a>
      </li>
      </li>

Answer 1

for example, hang the .noclose class on and handler:<li class="nav-item dropdown">

$(document).on('click','.noclose',function(e){
    e.stopPropagation();
  });

Answer 2

Registered in the code <li class="nav-item dropdown noclose">
at the end of bootstrap.js

$(document).on('click','.noclose',function(e){
    e.stopPropagation();
  });

Did not help

Answer 3

When clicking outside the menu item, for some reason, a style is attached to it that hides this element:
Look, in some of the connected js, hiding works for you. Something tells me that legs grow from here .