An issue came up in a game the other day. A hidden unit reacted to fire on an initiative unit and failed it’s reaction, allowing the initiative unit to move out of LOS. Does this expose the hidden units location? Or does the failure of the reaction test allow them to remain hidden, as if they didn’t fire? We interpreted it that if you want to take part in the action, you lose your hidden status on the board. Looking back at the rules, it didn’t seem as clear. Does anyone have input on this? Would an initiative unit have to spot the hidden unit even after it committed to a reaction?