Winchburgh Tunnel Alarm - No Phone Calls

The Winchburgh Tunnel alarm went off during my game today. But I didn't receive any phone calls with status updates or when I could run trains through the tunnel again. I ran the sim at max speed to see if any phone calls would eventually come, but none did.

I wonder if this might be because I run in Standard mode but have the number of failures set to zero (allows me to have train delays without having to manually set the sliders).

Could the fact that failures is set to zero mean it is stopping the phone calls about the tunnel from being made?

Regards,
Phil