Bootstrap 4 - NavBar within Container, activating modal causing shift

Question

hope I get get some help, kinda new to bootstrap!

I have a navbar within a normal container:

<div class="container fixed-top p-0">
  <nav class="navbar bg-secondary">
    Navigation Bar
  </nav>
</div>

And the page is quite long, so that the browser's vertical scroll bar is displayed. When activating a modal, the scroll bar is hidden, causing the navigation bar to slightly shift.

What am I doing wrong?

sample: https://jsfiddle.net/1owybuvq/

question from:https://stackoverflow.com/questions/65858205/bootstrap-4-navbar-within-container-activating-modal-causing-shift

Answer 1

Waitting for answers