This is a typical type of a scenario where a company finds that they never had Listeria under control. They may have not had a sufficiently robust program to find it....doing testing, but not really looking for it. Hard to say for sure what occurred, but further expansion of a recall is never what you want to see.
https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/lipari-foods-issues-voluntary-recall-expansion-additional-sandwiches-due-potential-contamination-0
Lipari Foods Issues Voluntary Recall Expansion on Additional Sandwiches Due to Potential Contamination of Listeria Monocytogenes
Summary
Company Announcement Date: January 22, 2020
https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/lipari-foods-issues-voluntary-recall-expansion-additional-sandwiches-due-potential-contamination-0
Lipari Foods Issues Voluntary Recall Expansion on Additional Sandwiches Due to Potential Contamination of Listeria Monocytogenes
Summary
Company Announcement Date: January 22, 2020
FDA Publish Date: January 22, 2020
Product Type:Food & Beverages Prepared Food Foodborne Illness
Reason for Announcement: Due to potential contamination of Listeria monocytogenes
Company Name:Lipari Foods
Brand Name: Premo, Fresh Grab
Product Description: Sandwiches