I am a witness.
I admit, I am not impartial.
So, you can suspect that I am lying and twisting the facts :D
But at least a precedent is being created – after resolving the dispute, regardless of the outcome, to encourage the community to introduce a rule to keep the save option enabled, and if a disconnect occurs in any battle, the rules should allow for a continuation using the battle.gm2 file (or a manual save, which players always make anyway, regardless of the save option))))

I see the situation as follows:
The opponent just lost almost a thousand skeletons (~800) under the Castle, which were also going second, and he had more troops in general.
He will attack with fast units and Implosion, sees the Cloak of Displacement, sees the newly equipped +1 speed instead of +3 to everything, and realizes that he won't be going first in the second round, which frustrates him (those who watched the streams saw how this happens), and he leaves, also from the chat.
He remains silent for half an hour, although it is clear that he is online (some may believe this, some may not, I am writing what I saw with my own eyes).
He could have immediately posted the win, as has already been done in this tournament, especially since the deadline is approaching, but we are tough guys and are ready to replay the battle.
But specifically the battle, not the turn, because it is important to know if the opponent has enough money to buy out the battle, maybe he was going to win/draw the battle with Implosion/Summons and didn't trade? This is unknown.
But there should be a save – isn't that normal when the save option is enabled?
But there is supposedly no save, and the internet supposedly "dropped":

Derbent (03/27/2017 01:19):
The internet dropped. We will continue tomorrow, I attacked you without the Castle, I will repeat the turn.

After seeing the pings during the opponent's silence (well, if the internet dropped, just say so, don't sit there and sulk), and then finally reading his quoted explanation, we have every right not to trust him, including regarding the save option and the fact that the turn will be repeated.
He could have taken a screenshot of the pings, or even recorded a video.
But we are tough guys, we don't need tech support, we just want to continue from the save before the battle.
But that file, unfortunately, was not available, which is why we turned to the administration