Can she see someone other than the team doctor?
What about her landing/where she is landing on her foot. She may be landing on her toes.
Something is not correct with technique if this continues to happen in the same place.
Supination could be an impacting factor. She may have been able to buffer it in the past, but has reached her body’s tolerance level with it. When that happens things start to show up and its game over until it is addressed. No warning nothing just happens.
Technique with other skills may be an impacting factor.
Is she warming up enough?
Drill work, warming up ranges/joints, movement