As part of the work for T195547, and in commit rEPTR12f2d3f7d00c: Allow sorting of AfC drafts by submission date, the stats display for the AfC side of the Special:NewPagesFeed was hidden via CSS.
However, the stats briefly appear as you transition between NPP and AfC.
For the AfC side, the stats should be hidden during transition or prevented from being added to the DOM to begin with.