Possible Umbra bug?

I was always under the assumption that Umbra was legitimately like you are casting "hide" on your army and that it doesn't qualify as camo at all. I've had a Tribunal in the past where I swore I could see Mummy armies. Is there a possibility of a bug here, or am I probably mistaken about mechanics or in game gifts maybe? Thank you guys! ------------------------------------------ (100%)1010/1010hp 99%m 91%mv 26000tnl (10 PM) (PROTECTED civilized outdoor raining) s High Road [Exits: north east south west] A large construct of shining silver stands protectively before its master. (Invis) (Red Aura) (Translucent) (Ghostly) A spectral infant orbits around the crimson-bandaged form of Itzenxilaatl. A thick-waisted man with silver hair and colorful robes strides by. An adventurer is here, trying to get a party to brave the Feanwyyn Weald. (100%)1010/1010hp 99%m 91%mv 26000tnl (10 PM) (PROTECTED civilized outdoor raining) w Itzenxilaatl leaves south. Someone leaves south. Someone leaves south. Someone leaves south. Someone leaves south. A shining silver construct leaves south. Someone leaves south. Someone leaves south. Someone leaves south. Entrance to the Paladin's Guild [Exits: east west] A local citizen in nondescript clothes makes his way through the city. (White Aura) Coated in platinum plates, this paladin protects his guildhall from intruders. (100%)1010/1010hp 99%m 91%mv 26000tnl (10 PM) (PROTECTED civilized indoor none) w Galadon's Soup Dispensary [Exits: north east south] A half-elven cook is dishing up hearty bowls of soup for hungry squires. (100%)1010/1010hp 99%m 91%mv 26000tnl (10 PM) (PROTECTED civilized indoor none) s The Chamber of Eternal Light [Exits: north down] (White Aura) A storm giant in pure white vestments stands here, calmly chanting a prayer of blessing. (100%)1010/1010hp 99%m 91%mv 26000tnl (10 PM) (PROTECTED civilized indoor none) vig You are already fully vigilant.