Selector speed keys work on selections
If you have a selection, the icons for these selectors are disabled (grayed out).
Clicking on them does nothing. Pressing the speed key opens the selector.
If an item is chosen this way, the item replaces the selection.
If nothing in the selection can be changed by the selector, these selector icons are disabled.
Clicking on them does nothing. Pressing the speed key opens the selector.
Bug or feature, you decide. Undo is your friend.