Reproduce: don't know
Description: After a fight with another player, I docked all my ships and decomissioned them, including my capital. I couldn't rebuilding my new capital ship so I decided to fight my opponent again without it. When he came to my planet he saw a ghost model of my old decommission capital still on the battlefield. He also couldn't see all of my ships according to him. He was also unable to shoot at me for some reason, but I could shoot and destroy his ships.
Steps to reproduce:
1. Build a capital and ships
2. fight near your home planet
3. Have the capital take damage
4. decommission the capital ship
5. rebuilt your fleet without the capital ship
6. have your opponent fight you again near your home planet.
7. There should be a ghost capital ship lying around and opponent should be unable to shoot at you and should be incapable of seeing all your ships.