First time I've seen this.........and commentary

[loners4me]

I get the "dont be that guy" but at what point would you call it. What if she stood there longer? What if she took a few more steps towards the endline?

[jTheUmp]

Did she step on the line while receiving the ball because of a bad pass from the L? I'd find it VERY hard to fault the thrower for that.

Spirit of the rule is that a violation occurs because the player is standing on the line to gain an advantage (specifically, being slightly closer to the goal on the shot attempt). In this case, I don't see the advantage being gained.

If she delays for a few seconds after receiving the ball or is on the line when she starts her shot attempt, by all means, call the violation.