As per the title, when the AWS is set by the yellow/red signals to alert in the Class 166 it appears to be auto acknowledging the alarm and resetting itself.
I haven't yet experienced it alerting at bizarre times. Will be more alert for it now, see if I can record an odd instance.
were you running a scenario? as i tested from scenario and timetable and timetable all safety systems activate and i have to acknowledge except when running scenario it auto acknowledges it. try scenario and timetable with safety systems on and see if u have a problem. it seems scenario has the problem.