Played this service. Ended with total gridlock. 4 trains stacked up trying to enter Kassel. Two freight trains stuck on reds trying to leave Kassel. Gave it about 12 mins, and than quit the game. Another 2 hours waisted
It is unfortunate that you encountered this - and I hope DTG fix it soon. Meanwhile, if you are on TSW4, you can use free-roam tools on the map to delete the problem trains. This does not apply to Journey mode, but it does mean you won't waste the 2 hours again. We shouldn't have to do this workaround, but our time is precious.