1. Go to eZ Studio,
2. Click on +Create button,
3. Choose Landing page,
4. Fill all required data in the landing page configuration form,
5. Submit it,
6. Add a new block - content list block,
7. Click on the added block,
8. From the block top menu click on the Delete button,
9. The block is removed but the overlay is still visible.

The overlay should be removed after deleting a block.