YouTube API v3 likes a video, but the counter doesn't increase

Whenever I try to like a video through the YouTube API, it flags the video as liked but the like counter doesn't increase whenever I do. It tells me that I've liked the video, because the like button is fully green, but it doesn't count it as liked?

I'm using this link through CURL with PHP:

https://www.googleapis.com/youtube/v3/videos/rate?access_token=(the token)&id=(video id)&rating=like

I don't get an error if I do this. I don't get any response back, which is correct according to the docs.

Could anyone tell me why the like counter doesn't increase?

EDIT:Dislikes can be added with rating=dislike, but likes won't be added to the counter !