The Rotor Light's only have the "Fold" toggle hitbox applied to the front face of the rotor Hub. This is in contrast to other rotors such as the Small Rotor for helicopters which have this hitbox applied to the entire Rotor hub.

This makes folding the Light Rotors difficult generally, and in multiple rotor setups this can prevent folding of some of the nested rotors entirely if a fuller block, such as a gearbox, is placed infront of the Rotor.