This not first time.
My teammate killed opponent both engine rooms with time left 3m 36s. And system show opponent 3m 37s he won. But when check the replay, actually all his zooka was killed before half way rush to the last engine room. Attached video URL uploaded to youtube. If you never check the replay you never know. Especially those can not completelly replay, error.
And why they willing let the troops killed? Because there is another Free Diamond bug. They can reinforcing troops with diamond from the shop without spending $$.
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Supercell, please fix all this bugs... Thanks!