For widgets that have filterOnInput, the menu opens when the input gets focused, and then close when a choose event occurs. This can product a very unfortunate side effect where the user is still typing the input, but the menu has closed, and will not reopen until the user clicks the mouse out -- and then back in -- to the widget, to trigger the 'focus' event.
We need to find a proper solution to this problem, either setting "hideOnChoose" to false on these menus, or making sure the menu appears on keydown or change of the input.