IIRC, this was reported in beta 2, and has not been fixed. When a life shard is converted to a death shard by falling under the influence of an empire, the info popup tell you that it has fallen under your control and click to build on it, but the graphic has disappeared, and if you click on it and try to build it won't build. The next turn the graphic for the death shard still isn't there, but if you click on the tile you can then build on it. After that the graphic appears.
