I am currently playing Supernova 1.51.375185.1 under Epic Games. I have noticed that my ship moves are not very straight forward. This is one small example. In this case I lose one hex movement. There have been other examples where the ship movement doubles back but I cannot see where it is avoiding something.
"a Fleet Delta" can move 2 spaces to the left, which is as you would expect.
Going one more space to the left causes the route the fleet takes to dip down. Again, I have seen the game take some crazy routes to avoid nothing.