Users are receiving notifications which have "Automatic Alert" in the title and body.
This happens when you have selected to send an escalation notification message, and have not specified the text you want to display.
By default our notifications have "automatic alert" in the title and body. When configuring these notifications, it's intended that this text is replaced with your own text, however this is not always carried out.
To confirm this is the case - check all escalations within the response levels for an Escalation Action of type notification.