Regarding the World Traffic Service AGOL map: https://www.arcgis.com/home/item.html?id=ff11eb5b930b4fabba15c47feb130de4
If I click the Open in Map Viewer button, the map viewer opens, and I see data (in the Toronto area) for a split second, but then the data disappears and I just see a blank map:

I don't have that problem if I use the Open in Map Viewer Classic link. The map/data loads as expected.
Could the World Traffic Service be updated so that it works with the new map viewer?
AGOL is not my area of expertise, so let me know if I've misunderstood something.