arrow keys bug

[tankeryy]

the left and right arrow keys works but up and down arrow keys doesn't work, i tried on different site and it works but on manga dex it does not.
every time i press up and down arrows a line where your suppose to type appears: https://imgur.com/a/FIqKXoN

Edit: nvm now it works now, might've pressed a button or something...
edit 2: found the solution https://support.google.com/chrome/thread/78208145?hl=en