I don't know if they really interpret the law this way, but to me, "in the keeper's eyeline" shouldn't just mean "between the keeper and the ball". If the player is in front of the keeper, even if the ball's coming from a slightly different angle, he's still interfering being a visual distraction. This definitely applies to Robertson, but not to Bernie, who was more to the opposite side of the Wolves goalie and he also dropped down to be even less of a visual distraction before the header came in. The bigger justification for ruling out the City goal v Wolves would be that Bernie bumps the goalie before he gets out of the way. Of course, if they decide to rule out goals for fouling the goalkeeper, Arsenal would be mid-table at best this season...