Images not being marked on a TV show

Isekai Ojisan - its gallery is listed as having 48 images, however its recent two episodes are updated with images that do not appear on the main gallery. I am not sure if this is a mistake to fix or not, but perhaps it needs investigating.

https://www.imdb.com/title/tt15219320/mediaindex

https://www.imdb.com/title/tt21304858/mediaindex

https://www.imdb.com/title/tt21304860/mediaindex