The issue was confirmed to be a bug in the unstable version and should have been fixed with the latest update.
"Train was stopping at station even if it was not the next scheduled stop (but further in the schedule). Then, it never moved again."
It seems to me that you should not use the unstable to play the workshop maps as the instability of this version may cause the maps to be banjaxed...

@coenvijge I'm sorry to hear that, I'm pretty sure I didn't encounter that problem, which looks a lot like the set up where commuter trains had to stop at every station they passed through in earlier versions of the game. Perhaps you could send me your savefile so that we can work out what's going on together.

The map looks good, but I can't finish it.

Around 16.45 there are two trains from Slade Green Depot (SE6941 and SE3917) that have to go to Dartford sidings. But I can't get them past Dartford. They stop at one of the station tracks and block them without continuing to the sidings. Am I missing something?