We had a situation that arose in-game that the rules were non-specific on.
My players were forced to duel each other in an arena, and the Ranger hit the Sorcerer with ensnaring strike. Afterwards, the sorcerer used his sorcery points to cast mirror image as a subtle spell.
The problem was, does he make three copies of himself that look ensnared? Or do they simply stand there, stuck mimicking his non-movement, but without the entangling vines? The concern was that he makes three copies without snares, and the ranger could find the real sorcerer.