Hi all,
I recently encountered a weird quirk with the "convert records to CSV" capability in the UnofficialSF base pack.
This eventually led to a known issue, created recently:
https://help.salesforce.com/s/issue?id=a02g7000008ATIf
The short version is that if you are getting really fancy and using a Screen Action to pass back a record collection that you want to convert to CSV, you'll need to re-query that collection in the "top" level Flow until they fix this KI.
Hope this helps in case anyone does a search or runs into this behavior.