Reordering of the Spaces fails for the lower four in the list.

May Spaces panel in the left side menu has 14 entries.
I can reorder them by dragging them with the mouse up or down.

But for the four entries on the bottom it fails, I can't drag them.

These are the entries:

1. Organisations
2. People
3. Contact
4. Unsortiert

Also, these four entries doesn't show a context menu if I click them with the right mouse button.

Also, there doesn't appear the three dots when the mouse hovers on these entries.