[IamMatt]

F2 had tossed the ball to the circle (habit?), and all of the defense had not gotten to the dugout (the infielders or players closest to the right side of the field were more or less crossing the baseline on the way to the visitor's dugout as she went to 1B and the outfielders were still crossing the infield on their way to the dugout) so once the last two or three of the defense remaining on the field realized she had gone, they sort of picked up the ball and stopped moving to the dugout and looked at her (uncertain what was going on) and would have been in a position to hold her from advancing to 2B.

Maybe blue could have awarded her 2B on obstruction, since she had to weave between 2 or 3 defensive players (impeding her progress) on the way to 1B.