When editing a course and moving a section, the editing icon used to rename a section disappears. The word - toggle also is appended to the recently moved section.

Steps to replicate:

1. Create a course.
2. Use Collapsed Topics as the format.
3. Turn editing on.
4. Make sure you have more than 3 sections.
5. Move section 5 to the first section

Result: The "edit section name" icon will disappear and the word - Toggle will be appended.