I checked-in the other day about fifty minutes before the scheduled departure time and the agent said that they were already boarding and that I needed to make haste. It was a trek to the gate, sure, but the doors aren't closing that early. Don't rush me, particularly when I'm seated in Y...

It's almost the same issue as airports such as SIN (or it might have been KUL). FIDS might display that the flight is boarding, but really it's just that security opened up and people are being advised to wait in the holding cell.