In ArcGIS Online Map Viewer, pop-ups configured using the Max function with alphanumeric values string field return results irrespective of the string type field.

Additional Information

Workaround

Use the Max() function with an array of the alphanumeric strings to return 'NaN' as expected. Example code:

var fs = FeatureSetById($datastore, "0", ["stringField"])

// create array to hold alphanumeric string fields

var myArray = []

// add each string field to the array

for (var x in fs)

{ Push(myArray, x.stringField) }

// return the max string value in the array

return Max(myArray)

// returns NaN

Steps to Reproduce