Added Expression does not appear in Arcade Popup

TimHayes3

I am learning Arcade. I am using Map Viewer. In Pop Ups - Attribute Expression - Add Expression, I created a basic Arcade expression:

Upper($feature.FACILITYCITY)

 

In the point layer I am using, when I click on a point all the City Names in the pop up's Facility City field should be ALL CAPS. But, the pop up still shows the values in this field as Proper. 

 

Any ideas on what I am missing?

 

Thank you.

 

jcarlson