Search Keyword not working as expected

*Overview:*Searching for "Voucher number", "Vendor invoice number" and "Accounting code" works fine; it took some time before I realised that the keyword index seems to have entries for those kinds of "numbers" only, though (all of the above can also be found with "keyword", but not "real" words, e.g. from invoice line titles, which I was expecting at first).

Steps to Reproduce:

1. Log into bugfest environment as folio admin
2. Click invoices app
3. search invoice by Keyword

Expected Results: Search returns result for all data points. "Keyword" label is updated to "All". includes searching invoice line description.

Actual Results: Search returns result for Voucher number", "Vendor invoice number" and "Accounting code" but not invoice line description.