Business Central OCR (Kofax/Lexmark): Invoice lines imported as G/L Accounts instead of Items

I am using the standard Kofax/Lexmark OCR service in Business Central to process vendor invoices.

The OCR import works, but all invoice lines are automatically created as G/L Account lines. Because of that, I receive this error:

Cannot find an appropriate G/L account for the line with description ‘LL-LAMPE’, ‘KOP-A’, ‘KOP-B’

These values are Items, not G/L Accounts.

What I expected:
Lines with vendor item text such as LL-LAMPE / KOP-A / KOP-B should be recognized as Item lines.

What actually happens:

• OCR imports the invoice
• Every line is created as Type = G/L Account
• System searches “Map Text to Account”
• Error occurs because no G/L account exists with that description

What I have already tried:

1. Created Item References with Reference Type = Vendor and correct Vendor No.
2. Entered Vendor Item No. values such as LL-LAMPE / KOP-A / KOP-B
3. Enabled “Use Item References” in Purchases & Payables Setup
4. Deleted and reprocessed the incoming document
5. Confirmed vendor number matches the reference

The problem still persists: OCR always treats lines as G/L Accounts.

My questions:

1. Does standard Kofax/Lexmark OCR support creating Item lines?
2. Can OCR distinguish between Items and G/L Accounts at all?
3. Is Item Reference + Vendor Item No. supposed to work with OCR?
4. If not supported, what is the recommended workaround — customization or different OCR solution?