I understand that it is intended behavior due to rails, but having the error in both situations would be clearer rather than a silent response in one and an error in the other.

Can you please add a mod filter to filter out all the mods that require space-age DLC? When looking at mods I'd like to install I now have to look through each one and make sure that it does not require the DLC as I do not (yet) have it.

Dragging belts to fill in blueprints that have undergrounds due to obstacles will skip/not place the second half of the underground.

Factorio 2.0.9, no DLC, no mods Creating a blueprint, if you adjust the grid position, then remove entities from the blueprint (by right-clicking on an item, like lights) the last grid position value you updated will 'undo' to its previous value. prerequisites: blueprint contains rails Grid adjustme...