using expressions in arcade display in classic viewer but not in map viewer

[JanetReynolds1]

I have a feature class that is joined to a sql database.  My arcade expression references the joined table when configuring a popup.  The popup displays in classic viewer but not in map viewer.  Any thoughts or ideas?  

[KenBuja]

I had a case when the popup with Arcade customization would show up in Map Viewer Classic but not Map Viewer. I added the layer to a map using the layer URL. It turned out to be a bug (BUG-000168557) caused by publishing the service with Time setting enabled.

Stand-alone ArcGIS Server 11.1 map services published from layers using the 'Filter using time' option fail to display pop-ups in ArcGIS Online.

The current workaround is

Disable the time setting either before or during publishing. Alternatively, consume the layer as a service instead of using the layer URL.

[JanetReynolds1]

Thank you so much for sharing your work around.  I will give it a try this morning.