@Alex Medved _ConfiForms_ helped me figure out how to import a CSV file so that it populated in a Smart Multi-Select field in Confiforms here: Solved: How to generate a confiforms macro multi-select li... (atlassian.com)
However, I needed to update my list using a new CSV file.
I went to the page and first selected "Cleanup API" which erased all the records. Then I followed the same process for importing the files, and after selecting "View/Edit Stored Data" I can see the whole list populated correctly like below:

However, when I go back to my field that should contain this list, it is now showing blank. Strangely, if I scroll, it appears that the correct amount of records are there (it takes a long time to scroll and there are roughly 500 records, so it seems correct), however, everything is blank. See below:

Anyone have any idea what I might have done wrong? I appreciate any help. Additional info on the import is I am importing a single column CSV file using UTF-8 (and that is how the CSV was saved), but the list is correct on the page that holds the records, so not sure what is going wrong when linking the Confiform Macro so the Smart Multi-Select populates with the records (that are not blank). Thank you!