When EDIFACT record is imported intermittently currency is not mapped when it comes from record field

For some EDIFACT records, during data-import, a currency is not mapped when it should come from a record field.
The issue was observed during investigation MODDICORE-177.

Steps to Reproduce:

1. Duplicate the "Default - Harrassowitz serials invoice" mapping profile
2. Update the new field mapping profile as follows
   • Batch group: "FOLIO"
   • Vendor name: use the vendor lookup to find and select HARRASSOWITZ vendor
   • Payment method: "EFT"
   • Save the profile
3. Go to Action profiles and create a new profile
   • Action: Create
   • FOLIO record type: Invoice
   • link created mapping profile to it
4. Go to Job profiles, create a new job profile and link the created action profile to it
5. Go to Data import and upload file from the attachments, select created job profile (from step 4) for processing

Expected Results: Import should finish with "Completed" status. Should create 1 invoice with 1 line item.

Actual Results: Import is completed with errors and there is a message "Currency Code may not be null" on the invoice tab of the json-screen