I just reproduced this bug. It's present since vanilla Glest. The problem is that the golem starts regenerating by the time the initiate starts building it. If the initiate cancels building the golem will continue to regenerate both HP and EP, and finally have full HP and EP. By this time it is still the small piece of stone and cannot move or attack. If, however, an initiate attacks the golem, then heals it, the Golem will become functional immediately when it reaches full health again.