Text Changes to Paragraph when you select the Heading type when already heading

Feature Request Summary: 

Fix bug.

Description/Use Cases: 

When text is set to Heading # (heading 2 in my case) and you select it and select Heading 2 again, it changes the font to Paragraph.

Business impact of limitation or missing feature:

It's just frustrating when you accidentally do it and makes me wonder what other similar bugs might exist making me think a ghost is undoing my accessibility work. lol