Steps to reproduce:

1. Open a comment form for a task.
2. Change the "Action" from "Comment" to "Add CCs". The form element to add a list of CCs should appear.
3. Reload the page.

What I should see:

1. The old comment text.
2. The "Action" selector changed to "Add CCs"
3. The form element for list of CCs

What I see instead:

1. The old comment text.
2. The "Action" selector changed to "Add CCs"

And there isn't any form element for list of CC's, or atleast it isn't visible.