TestCafe issue, onChange event not triggred for input box in a modal dialog box

I am trying to update a number on the screen. I click on the update menu that lets me update a number. When I click on the update button it will open a modal dialog box with an empty text box for the new number and a save button. The save button is initially disabled. If the user manually types in a number in the text box, the onChange event will trigger and the save button is enabled. However, if I let the testcafe script to put a number in the number text box, the save button remains disabled. My guess is that when I use the testcafe .typeText(inputbox,'123') it does not fire the onChange event on the text box. Any help on this is greatly appreciated.