It's not a bug, it's a feature.
From real golf it's well known that the player has to open the blade for a flop shot, rising the angle for a higher/shorter shot - the flop - and at the same time changing the direction to the right. This is simulated by WGT's game, flop shots go to the right.
Thus, we have two options to hit to the flag:
- hit the button earlier, about at the line before the ding line,
- move the marker to the left and hit the ding.
Both are performed by various players. I prefer the latter because hitting the ding guarantees better perfection of the shot, e.g. shorter roll on backspin.