Unowned in progress(2.5.4)

The narrower slice: open tickets whose latest recorded status is in Jira's in-progress category, whatever it is named and in whichever language, but still have no owner, whether they never had one or lost the one they had. Unlike fresh intake, these are work in progress with no assignee on record; deleted tickets, tickets in a project moved to the trash or deleted, and tickets whose events record no status that maps to a Jira status category are not counted.