I can't seem to submit my turn during a battle. It'll look like it's loading at the top of the page, but it will just do that forever and nothing will happen. This happened back when the Boppers were available for battle, too, and I ended up having to forfeit my match with one of them because I couldn't make a move. I figured it might have been a one time issue, but I'm still experiencing it today. I'm using the latest version of Firefox (41.0.2) on Windows 7.

Has anyone else been having this problem? Is it fixable?

I am not. I think it stopped doing that like a month after I made this? I don't know what was causing it but it hasn't happened again so I guess it either fixed itself or I stopped doing something stupid that I didn't know I was doing.