The sawmill in the screenshot is clearly a bugged passage.
Jebus Cross rules explicitly forbid using bugged passages until the corresponding ГО is broken through.
The key here is whether Blue was aware of this during the game.
And if he (almost) certainly was not aware, what kind of referee sanctions could be applied in a similar situation in the future?
Got an answer.
Yes, from now on I should pay more attention to mines near passages))
But then what should one do if they see such a roadside oddity? Interrupt the game, send the save file to the referees, and demand a replay if the passage is bugged?
IMHO, that reeks of absurdity. It would be simpler to allow it — specifically in a similar situation, not to be confused with others that might be similar but have different initial premises.
For example, in that textbook case, Maretti did not run around the standing ГО to pursue Stinger, whereas here there was no ГО at all