Dual antivirus engine alerts/notification.
The Avira Scanner died on the Customer's UTM for the 2nd time.
It then fixed itself a week after.
Customer did not receive any notification to say that only 50% of his AV scanning was functional (dual scanning turned on).
Dashboard was showing a green tick next to antivirus.
The only reason why customer noticed the issue was because they had issues with other module and they were going through the logs via backend.