The OP is not clear as to which came first, OBS F4 or bobble. Also, not clear which side of 2nd the OBS F4 was.
The runner made 3rd w/o any award.
The crux seems to be that if the runner had not reached 2nd when the throw reached SS, she would not have made 3rd w/o the bobble. Then, it's a question of whether the OBS F3 caused that delay or just a slow runner. If slow and not the OBS F3, then no award at all, even if she stops at 2nd.
If that was caused by the OBS F3 and ITUJ, she would have reached 3rd, then the OBS F4 matters. But, given "the runner had not reached 2nd when the throw reached SS", judging that she would have reached HP, even with the bobble, seems a real reach.
However, if the OBS were major, and the SS still had not controlled the ball when she reached 3rd, and there was some indication she would have tried for home
without the OBS, then a very tough call.
Besides, BU always hustle to position after a play!
