When started battle the game freeze.
Some times happen in PvP.
But most of time it's happens here with this team.
It's about time to do some kind of protection for this kind of bug.
Some way to undo battle. Or even save it for the players can continue from same place we're game freeze.
Now my guild will lose that amount of points. Maybe it's nothing, or maybe it can be the points needed to get one more star.