There is a problem using the latest version 4.8 of the ArcGIS JS API the Track Current Location Widget that causes web maps to stop rendering in several browsers (Firefox 61 MAC and PC, Chrome 67 PC, IE Edge and IE 11). This causes the map to render with the location marked with the blue dot but the base map and all layers to stop rendering despite the ajax request for the content being loaded successfully.
I have tested this with both WEB-GL rendering enabled on as well as the default setup used in the demo site.
Here is a sample of what I see using the demo application in Firefox 61 on a Mac: https://www.dropbox.com/preview%2Fmonosnap%2Fscreencast%202018-08-24%20-%20widgets-track-basic.mp4
Has anyone else had this issue? This is currently affecting a production application today despite being tested 10 days ago as working in the same browsers.