So I challenged my friends starter (lvl 1) Roc with my starter (lvl 1) Roc.

We battled a manual battle. 6 turns went fine, and at the end of the sixth turn, my Roc had 3 HP and hers had 2. We battled 70+ turns after that, and neither of us hit once.

The surrender-button wasn't working, and we decided to wait my friend's timer out to see what happened. I can no longer access the arena. The Tactic map seems unaffected as of now, but any time I chose the arena, there is nothing there.

I am using a Windows 8, and Internet explorer and I don't know how I could post a screenshot of what happens when I try to enter the arena.

Is this a bug?

EDIT: I can access the arena now, but I can't see an ongoing battle, and it still says that my Roc is busy fighting.

EDIT 2: Now it doesn't show anything again. Now I'm confused, please help <3

EDIT 3: Now when I try to enter the arena, it gives me this text: "int(2)". What does that mean?

EDIT 4: Actually, it seems fine now.. My pet is active, and my arena is fine at  the moment, I still think you should look into it though. 

Thank you reporting. We unstuck the pets but we'll be able to check the issue itself tomorrow. There can be a normal situation when battle lasts 100+ turns depending on the pets abilities and characteristics, but this can be a bug too. Sorry for the inconvenience.

Update: we checked the battle logs and run several test battles. There was no bug in the battle itself, it really lasts 50+ turns in average. The problem was only with script that should remove this battle by timeout.