Usually, I encountered such anomalies in scenarios. Here - in the timetable. I tried to do the Mastery challenge. I saved the game. I did not manage to slow down in time - SPAD. I have loaded the game. Before that, it was yellow in this place. After passing (theoretically - green), SPAD. The track ahead is busy. This 'green' is a bug. BR o7
It's a known issue that signalling resets to either default or some unknown setting when loading a savegame
