Menu items move after publishing changes in Studio demo

Steps:
1. Log in to Studio UI.
2. Go to the demo homepage.
3. Go to the Places & Tastes page.
4. Switch to Edit mode.
5. Modify the page e.g. by moving a block from one zone to another.
6. Publish the change.
7. Verify the order of items in the menu (the one with Blog, About etc.)
Actual: The Places & Tastes item has moved to the most right position.
Expected: Menu item does not move after modification.