Cloaked space yard ships

I am VERY disappointed. My brand new space yard ships started building bases on warp points Last turn. They were cloaked when they arrived, and I told them to build a six turn cloaked yard base. But on the next turn their construction queues were cleared. My whole strategy for secretly building cloaked yard bases above the 17 sphereworlds not yet colonized on my map is blown. Is this a bug or a feature ? If building with a yard component while cloaked is not legal, then it should not have allowed me to queue up the projects at all, rather than clearing the queue next turn....

Also, will a cloaked sensor satellite work while it is itself cloaked ? I verified that I CAN tell the sat to cloak and it will.

Also, I read in a thread that combat was occurring at warp points between cloaked ships and enemy ships which lacked the sensors to detect them. Was this a feature or a bug, and if a bug, has it been fixed ?