Since the 015 Update all Trains are not loading any Chunks around them anymore. In 014 this still worked for me and I saw the forced Chunks with the ChunkViewer on the right screen. I tried the disable and enable Chunkloading with the Activator tool, but this didnt helped.
The problem still exists in 016.

I have the same problem... I made a train, then i walk outside the chunk rendering/loading, and when i came back to see my train... it derrailed and did strange things ._.

Are you sure? We lowered the actual radius to 3x3 so you might not see it.

Yeah, I would see 9 green dots around me, like the other ones on the left side. Prior to the Updates I saw the 5x5 dots moving with the train.

Strange. We just changed from 5x5 to 3x3 and doing a check if a specified chunk is already loaded.

If you need more infos, just tell me!

I've made another test.. I've placed a chunkloader on the right an set it to 4 Chunks. On the left side of the screen, you can see the red marker. Then I started a train driving around down there at 40 kmh and then ported away. 5 minutes later I ported back and the train lost connection/derailed exactly at the boarder of the chunk loader

We got more confirmation of that.

I doubled over some of the changes, and there was only one difference i found that might be doing it, so I reverted that. with any luck that should fix it, but we'll see. This mod has a bad habit of taking "should" and laughing in its face, alongside working for me but not other users.

Could this have something to do with issue #379 where when you leave a chunk the train "crashes" or glitches out?

@TrainsAndThings I removed your first comment on purpose because it has nothing to do with eachother. The chunkloading was generally broken.