Another Travel Question

Saw this at a girls Varsity game tonight:
A1 & B1 going for a loose ball. A1 falling down onto her back while clearly bobbling the ball. A1 does gain control of the ball against her chest when already on the floor and doesn't slide. Ref called the violation.

I didn't think this would be a travel as she wasn't holding the ball before she fell.

Lead made the call and it's possible that he didn't have a clear view of the bobble from his angle. It was definitely a quick, bang bang type of play. It was bobble, on floor, control. She wasn't laying there bobbling it while on her back.

My post isn't to question the call of the refs, they did a great job. I'm just curious if the play as I described above would constitute a travel?