Some special characters (for example, ó) display as an HTML code in the title of the pop-up created by an Arcade expression when configuring and viewing a published Zone Lookup ArcGIS Instant App.

Solución alternativa

'Distrito electoral/división' was modified to be a constant in the title of the pop-up.

New Arcade Expression ({expression/expr1})

•  var SRPheading =  $feature.PLACENAME
•  return SRPheading

Final expression

• Distrito electoral/división {expression/expr1}

Pasos para reproducir