Played after long time Suffragette Line (Gospel Oak - Barking) with the Class 710 in timetable mode. And now I have there no AWS anymore. No sound, no blinking, nothing. No matter what time/service I start. On another route it still works, so it wasn´t a general problem with the gamesession itself.
I just tried it and the AWS was working for me on that route - how are you enabling the safety system? If you're using Ctrl+Enter then it won't work because of the way the switches are set up.