Steps to reproduce:
1. Create a new landing page with a schedule block inside.
2. In the schedule block plan the content to appear:
- add one piece of content at now time (eq.: 8:00),
- add another piece of content in the future (eq: 12:00).
3. Publish the landing page.
4. Edit landing page,
5. Go to the date & time (using timeline) after publishing the second content (eq.: 12:30),
6. Remove the content form slot.
7. The information about content being removed should appear in the full list view and in the indicator.