Obstruction vs. Fielder's right to the ball

[Mountaincoach]

This one I imagine is pretty straightforward for you guys. Just wanted your thoughts. R1 and R2 on base. Infielders were playing deep. Batter hits a slow ground ball headed straight toward short-stop area. F1 and F6 both charged for the ball. F1 got to the ball and threw it to 3rd base for the force out. At the same time, R2 had to loop around F6 who was charging for the ball as well and entered the baseline at the moment R2 was running toward third. Is that obstruction? F6 was indeed breaking for the ball, but F1 got to it before him. The call on the field was obstruction, and the runner was awarded the base. Thanks in advance.