When an issue has the "in-progress" label and no one is assigned to the issue then add a comment with

“Looks like someone is working on this one but there are no assignee. Who are you, mystery person (and thank you for your time!)?"

The comment should be added after a certain period of time from where the "in-progress" label has been added to not spam the issue. Maybe 3 or 5 mn after the "in-progress" label?

This issue will be estimated once I have done the spike #6