The spot she moves in
PositionCell, 81966, -158649, 1736, 0, "Aanthirin Region"

has her stand on a cliff from cell 9,-20
and she probably needs an invisible wall underneath centered in cell 10,-20
so she doesn't fall under when she ends up in 10,-20 and player is approaching from certain cells where she gets loaded before 9,-20 gets loaded,

it could also be worth removing the idle animation chances from her script in AiWander 333 50 40 10 0 0 0 0 0