Thanks for letting me know. I forgot about that "stick" when I was expanding the ship. And yes, removing it and adding some protection seem to resolve the issue. Thanks!

Very annoying game freeze appeared after building "Galaxy Absorber" ship. It is really big, but works fine 99% of the time. But every couple of minutes (not autosave) appears huge spike in [Entity Update -> Asteroids], which is caused by an unknown reasons, and this freeze could be 30 seconds long ...