The parent items do move down on my screen as well, but the toggle/arrow for the parent disappears if the parent item above it is expanded. For instance, the first 2 parent items with submenus are “Transportation” and “Directory.” When Transportation’s submenu is displayed (the toggle is selected) there are 3 submenu items, but the toggle for Directory has disappeared and will not reappear unless Transportation’s submenu is closed.
Just in case that was confusing, I’ve added 3 screen caps below:
1. Unexpanded (everything that has a submenu has a toggle/arrow to show the submenus)
2. Expanded Transportation’s submenu (Directory no longer has an option to show its submenu)
3. The location of Directory’s toggle (Using Chrome’s Inspect Element)