In the latest beta, I've noticed that every time I load up a game, all my current freighters start back at the start of their routes. My current game has a setup with all 11 of my trade routes (playing as the Korx) going from Korx to Iconia, and this resulted in all 11 mini freighters being on the same tile. While this makes them easier to defend, the huge dip in trade revenue every time I load a game is quite noticable!