Filter Function on Table

[BrittanyZucchetto2]

Hi there,

I'm currently working on an arcade script that compares a table of values to a feature class. They both have the same unique identifier and can have a one to many relationship (THIS IS NOT A RELATIONSHIP CLASS). I have the map and table both in my map viewer, and I am trying to create an arcade script that pulls the values of the table into the pop up of the feature class.

I'm having issues with getting the filter to compare the occurrence_source_key field from the table to the feature class.

 When I change the script to compare OBJECTID's, which we know are not the same, however, the information is correct.

Does anyone have any knowledge as to why the script is not returning a result?