File encoding issue after migrating to 8.2.2

Our customer has been importing ANSI-encoded files to OS, which contains spanish characters, as 'ñ' and accents, for years. These characters were recognized properly until OS 6.8. But after migrating to 8.2.2, they are no long: 'España' is shown in the workflow as 'Espa�a'.

This is a big issue for the customer, as they use the workflow stage tables for OS reports and export that data to a Data Warehouse.

We have tested encoding a file as UTF-8 and worked, but changing the encoding the files is not a good solution for the customer as they load files from many different sources.

This looks related to the migration: Is there any way to load ANSI-encoded files without this problem?