The practice of half entering the gate when it is still switched off is a mistake and a violation.
In some places its written in the airport plates.
With that im not blaming turkish at all, i havent any clue of the situation.
But I can blame Asiana for sure.
Unless the turkish moved backwards, which I doubt, the Asiana had to WATCH where they are going.
Period.
Could you expand your statement. Violation of what? I don’t remember anything written about this in Istanbul terminal charts.