Why are we not getting job alerts when family is not selected?

Summary: Some employees, those that have indicated a job family interest, are receiving the internal job alerts. Where others, who do not have family selected, are not getting anything. They noticed they stopped receiving any notifications shortly after 24B went into production.

Content (please ensure you mask any confidential information): We have internal job alerts set up to kick off every 3 days. The information they (those not receiving the alerts) have selected a specific business unit, but not a job family. They should in theory receive MANY jobs in the notification vs. nothing at all. Is there anything that changed in 24B around internal job alerts?