Double Base

[mach3]

We had this situation two weeks ago and find our discussion results not really satisfying. Maybe you can offer you viewpoint. It was played under ISF rules, but ASA or any other rulebook is of interest.

Sit.: Hit to the Infield. BR arrives at 1B befor the throw, but steps on the fairportion of the Double Base and stays there! Never leaves the bag and did nor overrun it.
No interference with F3.

BR violated a rule ("missed the base") but can it be punished? If they appeal it correctly can you call her out for missing 1B, the base she's standing on?

What if there is an injury on F3 due to that?

Thanks

Raoul