I just encountered a relatively minor bug while designing ships to finally stomp this annoying spiritualist FE. Whenever I save a ship design that includes a Dark Matter Powerplant or Propulsion, both revert back to old components (lvl 5 and 4). It's quite annoying since I don't want to keep using my old, inefficient fleet design. Has anybody else experienced this kind of bug? Is there any trick to make it work, or do I have to wait for the developers to fix the game?