Force autocomplete to reset internal state when invalid value is entered

Author: bseth99

ui/jquery.ui.combobox.js

@@ -146,9 +146,14 @@
                 if ( !valid ) {
 
                    // remove invalid value, as it didn't match anything
-                   $el.val( "" );
+                   $el.val( '' );
+
+                   // Internally, term must change before another search is performed
+                   // if the same search is performed again, the menu won't be shown
+                   // because the value didn't actually change via a keyboard event
+                   $el.data( 'ui-autocomplete' ).term = '';
+
                    this.element.prop('selectedIndex', -1);
-                   //return false;
 
                 }
             }