Sometimes the avatar will be turned around, facing to the "camera" - doesn't affect the stroke though and disappears if you "grab" the aim marker.
The flag will be "physically" in the hole when you putt from the fringe. You should pull it by the flag symbol in the upper right. Once the ball is on the green, it's only virtually visible but always pulled.
Ball flight or roll may be a tad random at times - that's the game.