Notifications: Updating Story description renders a partially empty Story Change Notification email

Issue Summary

Updating Story description renders a partially empty Story Change Notification email

Steps to Reproduce

1. Create a new Story
2. Subscribe to the newly created Story
3. Update its Description field
4. Browse to Email Log page
5. Notice the Story Change Notification email is missing:
   1. Story Title (as email subject)
   2. Story Title (as email details)
   3. Story Description (as change details)

Expected Results

1. Story Change Notification email should contain:
   1. Story Title (as email subject)
   2. Story Title (as email details)
   3. Story Description (as change details)

Actual Results

1. Story Change Notification email is missing:
   1. Story Title (as email subject)
   2. Story Title (as email details)
   3. Story Description (as change details)

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.