This bug is happening on the official test server, as well as in singleplayer, as confirmed by Spunkie (tim night).
When a block is placed on an asteroid it causes instant server crash both in multiplayer and causes a game crash in single player.
This has been tested with "Grey Standard Armor", "Override Effect Module" "Red Planet Terrain".
To reproduce:
- Place any block on any asteroid.
- The asteroid will disappear and the server will crash.