I've noticed that this loader sadly doesn't work with AAI Vehicles, but it also doesn't work with normal train engines either.

It seems to only work with containers and cargo wagons. So it would be nice if this could be updated to be able to interact with more things.

Entities not covered by base loader mechanics won't be supported.
Handling entities like cargo wagons in lua script has terrible performance.

You can use Miniloaders for other entities, as those are inserters.

They also now don't seem to work with cargo ships, not sure why. I relied on them for this before.

With 1.9.0 onwards LR relies only on base game mechanics.

If loaders don't work for skinned trains it might be due to layers, collision boxes or hit boxes of the modded rails or trains.