Question for the group:
How many of you have noticed this happening while idling mid-battle (maybe going to a different tab during the battle), then coming back to it? Vice versa, how often does it happen if you are playing normally? Additionally, do most of you have multiple tabs of Flight Rising open WHILE battling? Does it improve if you do not?
Also, Coliseum has gone through some pretty major changes in the last week, so it may also be a safe/good idea to give your browser's cache a clear, just to get rid of any weird residual data that might be hanging around. You can find instructions for that here:
http://www.wikihow.com/Clear-Your-Browser's-Cache
Thank you for keeping things constructive and descriptive. We are getting closer and closer to true stability thanks to you!