I'd vote for having the implementation changed, so that pieces are revealed only by spies not captured in that turn.

My main reason is that it is almost always possible to enter the piece-moves in a "safe" order, so that the captured spies cannot take effect in that turn any more. The rule variant has almost no effect on the game, except that players who don't know about the "bug" may have their pieces revealed unnoticed by themselves. It is just a trap for the uninformed.