Report and let live support look into it. They'll figure it out
In order to cut down on bandwidth and latency, a lot of mobile games like CC will run battles client-side and report results to the server. It's not like a typical MMO where all stats are run on the server. Because of this, I believe most of the exploits up until now probably tinker with values in memory on the client.
I don't think they will ever change this, but there are some "tricks" the devs could use to authenticate the results at least a bit. I'm guessing they started to do this to cut back on hackers. I'm not positive on the best techniques to prevent this sort of hack, as am I a form game developer but don't have too much experience on the network side of things