lindsay_thomas@esri.com
Below is a summary to the resolution that John figured out and shared with me via email:
I decided to run the Campus Locator using the ArcGIS API for JavaScript 3.25. This inadvertently caused the application to not support the ‘label’ tag of the config.js for the popupFields. I resorted the application back to 3.20 which supports the ‘label’ tag as well as the labeling from AGOL.
John, please jump in if I missed anything
-Lindsay
Also, just a bit of information about configurable JavaScript applications created by the ArcGIS Solutions team, the application was created and certified on ArcGIS API for JavaScript 3.14. However, when updating the API to a higher version there could issues related to the upgrade that may require addition coding\fixes. If there is a business need to increment the API version of the application then this may make sense, however, if the update is just related to using a newer version of the API, if may not be worth the additional level of effort to fix issues related to the using the higher API version.