Service 1C38 (Chapter 6, No. 4) crashed in the tunnel just before Stratford. On PS4 with the recent route update. Putting the journey in with the high density timetable might not work with 8th generation consoles.
Tried to do 1C38 again today, it still crashes just before Stratford. I think it has to do with the scenery block for the station failing to load properly. Before the update, it would freeze for two or three seconds to load the block for the area. Might avoid Javelin runs for a while.
Happens on Xbox One for me as well. Most of the 395 services in fact. Just means that the Javelin services are unplayable, as long as the selected service doesn't go through Stratford (as the majority do).