Proper attribution on ArcGIS online

I've created a web map and accompanying web app on ArcGIS online and I'm trying to get the attribution correct. I used POI names from OSM for labels and I've placed the following in the Access and Use Constraints section:

Map data © OpenStreetMap contributors

License Link: www.openstreetmap.org/copyright

I also included Map data © OpenStreetMap contributors in the credits section but this doesn't seem to carry over to the web map itself. Any idea of how to get the notation to be listed along with the other credits on the web map or even if it is definitely needed?