As you guys may know, there is a stuff called Mission Colonies in the game. They are non-player colonies which serves as a target for Missions.
Each player are assigned to the nearest MC when they create a Colony/Castle at the beginning of the game.
But then I found a serious bug. After relocating with a demanding cost according to my alliance's instructions, and checking out the Missions for quick resource replenish, I realised that my location was not updated.
The BD still referred me back to the MC at my entry to the game, which was already out of range for any squad to arrive at. In such situation, Missions progress are slowed down because the slots were full of "Attack/Transfer" missions.
This was found in a Earth world. This probably applies to Mars and Fantasy world, but may not be true for Galaxy worlds because they appear as a separate server from those 3 worlds...