On the Wikia, it does have changing switch template. like switching image, it does not working to change image from wikia. If you see Ako Saotome article page, see the template why does not work switch template.
In Episode 18 (Aikatsu Friends) Article, the image not updated for no reason. if you open tab or click the image, it was updated.
On the wikia, always updated image. but there is no reason why doesn't updating the image.