bearfoil
Yep, put the trailing edge front on to high speed air flow. Barn doors are not designed to withstand airflow from behind [swept wing roll without VS, flick, yaw, all over red rover]. The only way that could happen is loss of the VS following assem upset at alt.
What precipitated the loss of the lateral control [the VS] is any ones guess [
Takata will chime in i'll guess].