I've had the same issue. Until it's solved you'll just have to double click instead.
so does that mean there is nothing wrong with my arrow keys it's the website?
Yup.
Yeah.....I also have the same problems and even now it's still not back to normal yet. So, I guess we just have to wait till Mangago fix this glitch themselves.
So I'm not the only one. I fell relieved.
I was thinking I broke my keyboard ╮(￣▽￣)╭
starting yesterday whenever I try to use the right and left arrow keys to go to the next page it won't let me. i have to hit the refresh page everytime i use the key. HELP!