I am not sure if this has been discussed elsewhere or not. I captured the Thalan homeworld that had 3 trade good buildings on it. Harmony Crystals, Xinathium and Aphrodisiac. However I did not get the rights to these trade goods. I even tried giving the planet back and re-conquering it. The only other option that I can think of is to give the planet back again, re-invade using tidal invasion so that all the buildings are destroyed and then rebuild these trade good buildings. Has anyone else come across this quirk or bug? Thanks.