Chunks not saving properly on ships, resulting in repeated iterations of ships with huge chunks missing. Admin loading a new copy still has same chunks missing every time. The original, never deleted, has the chunks missing now. Creating a new world and admin loading still has same chunks missing. Closing and restarting client does not help. Dropping new cores and re-starting project does not help - new cores eventually develop the same missing areas if I repeat the build from scratch.
This bug does not occur if the buid-helper shape used for the main hull is directly centered on the ship's core. It only seems to happen if I offset a large hull.