rule question ncaa

[newump]

R2, two outs. B1 hits a high fly near third. F5 settles under the ball on foul ground but then moves toward fair ground in an attempt to catch the drifting ball. Just before the catch, R2, who had selected a path to avoid F5's original position, bumps into F5 between third and home and the ball falls to the ground in fair territory, uncaught.

interference on R2 or not??