Select event not fired on clicking over already selected ComboBox/MultiColumnComboBox item. According to the event description, it should be "Fired when an item from the popup is selected by the user either with mouse/tap or with keyboard navigation". It is fired when pressing Down arrow again when the last item is selected, but not fired if the last item is clicked.
Regression since 2018.3.1017 - Dojo introduced with the fix for Unexpected ComboBox value selection, instead of text, when an item is selected with Enter
Select event is NOT fired.
If we expand the widget and press Down arrow, select event is fired once again for Item 3.
Select event is fired as with version 2018.3.911 - Dojo.