- Go to Special:NewPagesFeed on beta labs
- Set the mode to "Articles for Creation"
- Set filters to State: All, Predicted class: (none selected), Predicted issues: (all selected)
- Note that every page appears 4 times. Some older pages appear 3 times.
This only happens when all 4 predicted issues checkboxes are selected; it doesn't happen when selecting any combination of 3 checkboxes.