Highlighting within a word reverts to wiki markup in the Rich Text Editor

Summary

When applying a "non-macro" character formatting applied to a portion of a word: bold, italic, underline, strikethrough, subscript, superscript, monospace in Visual mode, the text formatting looks as if it works but upon saving the comment or clicking on the Visual tab again, the formatting is not saved and the wiki markup will be displayed instead.

Steps to Reproduce

1. Go to any JIRA Issue
2. In visual mode, try typing in for example:

   *Bold*face
   +Under+line
   -Strike-Through
   {color:#d04437}Color{color}ized

Expected Results

The parts of the word that has the text formatting applied to them will be correctly rendered.

Actual Results

When the text is saved, it will be displayed like this:

*Bold*face
+Under+line
-Strike-Through
Colorized

Notes

• As we can see from the example above, only the color formatting is working.
• If you type "Boldface" in visual mode manually and apply the text formatting via the UI buttons (eg. clicking on the B button) or keyboard shortcuts (eg. Ctrl+B) it will appear correctly in the visual mode but upon saving the results are the same.