Summary

When using panel with a title background color name (does not impacting color code), will cause the text updated in the panel failed to save. For example:-

{panel:title=ToDos|titleBGColor=blue}
Some Text
{panel} 

Paste it into your description or comment and save it. Then edit it in visual mode, and save it again. The edited text will not be save.
It does not cause issue if we using color code instead of color name.

{panel:title=ToDos|titleBGColor=#FF0000}
Some Text
{panel}

Environment

JIRA Version : Tested on JIRA 7.3,7.6,7.9, and 7.9.1

Steps to Reproduce

1. Copy below panel into your description:-

   {panel:title=ToDos|titleBGColor=blue}
   Some Text
   {panel} 
   

2. Save it and it should showing panel with title background color blue
3. Edit it in visual mode and save it again
4. The edited text will not be saved.
   Does not happen if we use color code instead.
   If we using Text Editing mode, it working fine.

Expected Results

The panel should save updated text.

Actual Results

The panel does not save and revert to the original text.