gaunt granite
Discovered this while trying to change layout of my train stations. Suppose you have a train running on a rail, and you decide to build a new rail close to it. Then if you merge both rails while both trains are running on the merged section, then remove the connection between one of the Locomotive tile, both trains will still remain active and running on the lane.
If you try to reconnect the disconnected locomotive to a new track, no train will be affected and your track will stay empty (blue arrow screenshot 1)
Looks like if you try to remove or move (Ctrl+X-> Ctrl+V) the disconnected Locomotive, train will disappear from track (2nd / 3rd screenshot, after deleting and replacing 1 Locomotive. 1 train disappeared from first track, and appeared on 2nd track)
Playing on 0.0.7, Supporter extended edition, with Vulkan.
formal wedge