Batch export error: wrong Financial Types on edited contributions

We've detected a bug on batch exports and have reproduced it on the demo server as follows:

• Find a contribution to edit and change the Financial Type to a different Financial Type
• Create a new batch
• Assign this edited contribution (and other contributions if you like) to the new Batch
• Close and Export the batch

In the resulting CSV file, the edited contribution will have the original Financial Type listed rather than the edited Financial Type (despite the screen showing the correct FT throughout the process, and the contribution showing the correct FT when loaded in CiviCRM)