Lower fairing on the MUS (the skip-node) fairing is not jettisoned properly on decoupling of the part-below-the engine. Instead the fairing is being parented directly to the engine, rather than the decoupled part; as such the fairing persists on the vessel until a save + reload (it is a temporary object and not part of the part-tree).
Lower fairing on the MUS (the skip-node) fairing is not jettisoned properly on decoupling of the part-below-the engine. Instead the fairing is being parented directly to the engine, rather than the decoupled part; as such the fairing persists on the vessel until a save + reload (it is a temporary object and not part of the part-tree).