This isn't a straightforward situation. On Diamond, for example, the portal can easily be broken on turn 112. And even on X3DM1, it's often broken on the first turn, although this encounter isn't particularly likely.

Regarding the main topic: I believe that the current logic of the game required a replay of the blue player's last turn, but Zee should have requested this immediately (it seems from the stream that he immediately understood what happened and could have not waited for the outcomes of all the previous battles). But by then, after the red player had already moved and won 3 battles against the blue player, it was too late. You formally agreed with what was happening as soon as you started moving in the first combat encounter.