What do you mean exactly by it "doesn't work if there are too many images available" ?

@RasitAyaz said:

Upvoting/liking and downvoting/disliking backdrop images apparently doesn't work if there are too many images available. I don't know if this is a bug or unimplemented feature but I wanted to report this. Here are two examples of this situation:

https://www.themoviedb.org/tv/57243-doctor-who/images/backdrops

https://www.themoviedb.org/tv/1622-supernatural/images/backdrops

I just tested by upvoting and then downvoting the image at the top left in that first link. Both times I got a confirmation that it worked.

I'm sorry, now I tested again and it works fine. However sometimes clicking like and dislike buttons scrolls to top and does not return any confirmation message.

Ya, there is definitely something going on with some of these pages with hundreds of images. I've created a new ticket to track this here. Thanks.