Additional, I noticed something else by my turrets, the ones who disappear and appear sometime somewhere, not every one that are build in the shipyard, they are even not working with the ai module...may it help you with testing

Why are ships build in the shipyard then disappearing (or just the visualisation is a distance away) that doesn't fit in your theorie of entities will not dissapear until moving/turning them

new information for my last post. The ship is everytime at the place i where i left it. If it seemed to be dissapeared, it is back after 1-2 restarts, sometimes the server crashes while loading the structure with the shipyard and design on it. After the crash the server starts up normal and everything is fine. Another thing is interesting: The ship is not away. The ship is at the shipyard anchor, i newly activated an energy generator in astronaut mode where the ship should be, in fact the ship was visualized about 10km away from me, even with the navigation mark

I mentioned another thing. If I build a ship in a shipyard and place too many blocks at once so I need to restart the game (or mostly my computer) sometimes the builder entity is about 10 km away, not physical. I'm not able to enter it. At the shipyard the design is unloaded. If I try to load the design an error occurs, that the design is not able to be loaded because it is not a correct design ( I'm not able to define the error better at the moment) also I'm not able to select the design over navigation and add it as blueprint via command. All in all the design is completely lost in most cases