Topic: [Bug/Fixed] Thumbnail glitch

Thumbnail glitch

I don't know what happened, but two of the images I uploaded have unrelated thumbnails that look different than the actual photo.

https://e621.net/post?tags=user%3AKanjiKunHusbando

This picture of Prototype Jack from Tekken instead has a derpy Ryuko from Kill La Kill as a thumbnail...

https://e621.net/post/show/1814527/clothing-c-r-o-f-t-dancing-eyewear-gloves-hat-hi_r

And this Egg Pawn drawing has a photo of someone

https://e621.net/post/show/1816212/advert-man-black_skin-blue_eyes-egg_pawn-flapper_-

Sorry to be a bother, but does anyone know why this is happening?

Edit: There's also some bird-monster thing in place of this drawing of a Paper Mario character.

https://e621.net/post/show/1814132/angry-black_eyes-blush-butt-clothing-female-flip-f

Updated