This may not be classified as a bug but more along the lines that it's just badly designed. Cyclops Lurker has Hidden Chasm stealth meaning if it is not in a chasm it loses stealth, one of his upgrades however is shadowspawn and due to not being able to deploy on a chasm even with the chasm walker ability it is a wasted upgrade and a perfect example of a flaw in one of many runes.
Hidden: terrain abilites should be changed mechanically, so they don't destealth if the stealth comes from another source, or moved to upgrades always
Lol! The post-trade link on poxbox currently points to this thread for some reason. I guess people didn't bother reading the thread they were posting in. edit: it actually points to the SOE forums. I guess it's being redirected here and getting screwed up during that process.