Issues with toggling the boldness of certain sections of text

Summary

Can't turn some Bold text weight to normal in Answer editor

Content

Ever since the latest answer editor came out we've had some users report that they cannot toggle the boldness of certain sections of text. 

Here's what I discovered...

In the answer source code, if the text is surrounded by paragraph tags that indicate font weight, then it doesn't work: <p style="FONT-WEIGHT: bold">text you are trying to bold</p>

Conversely if there's span tags indicating font weight, the text boldness can be toggled back and forth just fine: <span style="FONT-WEIGHT: bold">text you are trying to bold