Hidden items in menus are not supported for end users and should be used at your own risk. However, you can actually right click on the table and select “list view”, so this is nevertheless a supported (and documented) feature.
The issue seems to be that the resize handle is preventing the down arrow from registering a click. In v9, the handle appears to register the mouses presence without blocking the down arrow from receiving the mouse event.
I have found a workaround: It turns out you can click on the “length:300” section and receive the same dropdown for moving through sections of the list.
Please try again in the current v12.1 dev / rc version! For me the start index menu now works again (as does the context menu for table views that let you switch to list view):
