I haven't had that, but a local player came into the situation recently. (A)ctive player Combat Jumps a Shasvasti Cadmus Seed onto the board, together with its Decoy, next to an opposing Camo Marker of the (R)eactive player, which the (A) suspects (correctly, in fact) of being a Mine. Combat Jumping explicitely does not cause the model to reveal out of Decoy status. Decoy does not execute an Order, so it does not trigger the Mine. The Cadmus Seed has just executed an Order (Combat Jump, a Long Skill), and therefore, by the rules, should trigger the Mine. The Mine has no choice but to get triggered, if an Order got executed in its ZoC & LoS. However, identity of the markers is Private Information, and it works both ways. Therefore: (R) can't ask whether the Decoy marker in his ZoC is the model (which triggers the Mine) or Decoy (which does not). (A) cannot ask whether the Camo Marker is a Mine (which has to explode - if there was a Model executing an Order in its ZoC and LoS) or Model (which has the option to declare Idle. Or anything else). How that situation should be resolved, rules-wise? My gut instinct would be "the mine explodes against whatever target is in range, or (R)'s choice if both are", but that's just it - gut instinct, not the letter of the rules.
I would say that the fourth bullet should kick in Since the Trooper i represente by both the model and the decoy, when the Cadmus drops, mines trigger.
The basis for the potential confusion is the assumption that the decoy isn't executing any order and therefore shouldn't detonate the mine. But the fact is that for the mine, both the troop and the decoy are executing the order: one deploying, and the other... well, being a decoy. As mentioned before, both represent the troop, and for the rest of the elements on the table (other troops, positionable weapons, etc.), both have been activated by the order. The mine has to explode. If by some cosmic fluke it can affect both, all the better. But since that's unlikely to happen, the player has to decide which one it affects (and hope it's the right one).
