"Switch to Rich HTML Editor" can remove the email script embedded on the notification body

When clicking on "Switch to Rich HTML Editor", then "Revert to plain editor", and again "Switch to Rich HTML Editor", it changes the notification body, and on some cases remove the mail scripts.

1) Update a notification that has Sys Version set to "v1" which contains a mail_script to Sys Version v2 using UI Action "Switch to Rich HTML Editor".
2) Click "Show Notification Scripts" UI Action to see the mail script was converted to the sys_script_email record.
3) Delete this sys_script_email record
4) Click "Revert to plaintext editor" on the notification to go back to v1
5) Repeat step 1 to convert back to v2
6) Repeat step 2 and see no sys_script_email record created

1) Click "Revert to plaintext editor" on the notification to go back to v1
2) Clear away everything in the message_html field on the notification (will not be on the form if v2, use list view or perform this step before reverting)
3) Click UI Action "Switch to Rich HTML Editor"