In the new editor, if you're using a macro such a page properties, that has a table inside it, if you set your page editor to full width, the table inside the macro automatically adds a horizontal bar to it.
- Create a new page
- Insert a page properties macro and make sure to have a table on it
- Set the page to "Full width" mode by clicking on the Wide arrows
- Publish the page
No scrollbar should be shown
There's a scrollbar, independent if the table has contents on it or not.
Setting the width of the page to "fixed width" and the scroll bar should disappear.