onChange trigger for field type = Item

I have a problem where the onChange event is not being triggered on a Form field in Innovator 9.3 SP8.  The Form field is of type = Item.  When the user clicks on the Item selection widget, Innovator displays the Item search dialog.  Then the user searches/selects the desired Item and clicks on the green check.  The Form field is updated and shows the keyed-name of the selected Item, but the Field event method that I have for onChange does not execute.  If the user manually keyes in the keyed_name for an Item into the Form field, instead of doing the search/select, the onChange event does trigger.  Has anyone else run into this problem?  I have a work around, but it is not exactly what I want.