Additional comments, Work notes, and Activity log are not displayed in the Change Schedule when in UI16.

1. Log in and ensure you are using UI16. If not:
   1. Click the gear icon in the banner frame to open the System Settings window.
   2. Click the Switch to UI16 button.
2. Navigate to Change > Schedules > Change Schedule. 
3. Open any change request in the Change Schedule.
4. Click the Notes tab in the change request and note that Additional Comments, Work Notes, and Activity log are not displayed.

Download the attached client script to resolve this issue in versions prior to Istanbul, where we have been unable to reproduce this issue.