I haven't seen this issue before
the export executes a SQL to export data from AIF_HS_BALANCES. If you set log level to 5 you can see the SQL and run it in your SQL tool.
What do you get?
I set log level 5 for the app and system but don't see that query.
I can see data for the load id in the AIF_HS_BALANCES table for the amount and data columns though...