This is not an exploit. An exploit is something that gives you an advantage that you would usually need to pay for like giving you gold, locked crates, experience bonus and so on.
Having better stats in maps because of a bug has happened many times in the past and does not affect anyone. And don't even think about saying it gives an advantage in PvP. STS doesn't care about those stats because they really don't affect the overall game experience or economy and in effect their profit. Plus this alleged exploit is available to everyone.
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