Looks like City Attack now counts as an act of aggression to the Aliens. I just did some testing and can confirm that, if you never ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever attack any alien not even with the city attack they will not eat trade routes, but after loading the game and attacking with only my city (from 2 tiles away) they did eat my trade route as expected.
Does this include trade routes committing suicide by trying to move through a neutral alien? I'm pretty sure in the original screenshot above I had not done a single aggressive thing towards the aliens. Notice how many are around and how not a single one has any damage on it whatsoever. If trade convoys/vessels can move through 0-aggression green/neutral aliens, that would be great, but I don't think that's the case...