Your bar is not scrollable. At least that’s what I see in the front-end. A scrollable bar has the scroll markup or structure.
Your bar doesn’t have that.
With that said, make sure Scrolling is enabled in your bar setting.
The bar should be scrollable by dragging. However, the button is still not fixed. I’m using Pro 5.1.5 like on your site.
If scrolling is enabled, there could be some customization that’s causing the issue. In that case, please temporarily switch to the parent theme then test the case again.
If that doesn’t help, please give us the following info in a Secure Note.
- WordPress Login URL
- Admin username and password
You can find the Secure Note button at the bottom of your posts.