New paragraphs don't show in newly added accordion sections

Problem/Motivation

When adding a new accordion section, any paragraphs added into the new region do not display at all until the page is saved.

Steps to reproduce

• Add a new accordion layout
• Add a new accordion section to that layout
• Expand the new section and add a new paragraph to that section (note the paragraph popup window appears not to have all of the required styling)
• After adding the paragraph see that the accordion section doesn't rerender correctly to show the paragraph you added.
• Save the page.
• You should now see the missing paragraph in the accordion.