We have an application that has been running for several months that leverages ArcGIS Javascript api 4.xx. When the application loads the map control is initialized using a dojo.require function:
require([ "esri/Basemap", "esri/Map", "esri/views/MapView", "esri/layers/MapImageLayer", "esri/layers/FeatureLayer" ], function (Basemap, Map, MapView, MapImageLayer, FeatureLayer)...
Suddenly, late last week or early this week (around 11/16/2020) when the page first loads the map does not appear and the DevTools console shows the error: Uncaught (in promise) ReferenceError: require is not defined.
Pressing F5 refreshes the page and then the map loads normally. But if I close the browser and navigate to the application again the same behavior; it errors on the first load but it works on a refresh.
Interestingly, this appears to be limited to Edge (I'm running 86.0.622.69 which was released on 11/13). I have not been able to repro the problem on either Chrome or Firefox. As I mentioned this application has been under development for over a year and running in a production environment for several months. No changes to the mapping code have been made for quite a while. Edge is the browser I normally use while developing.
