Hello !

The "Notify about canceled escalations" option in Trigger action operations does not reliably send the documented cancellation notification when an item is disabled (directly or via LLD lifecycle rules), especially if the escalation hasn't completed its first step yet.

The core issue: Even with the checkbox explicitly marked, disabling an item fails to update the escalation state properly to trigger the notification. As a result, downstream ticketing/ITSM integrations that rely on the "Escalation cancelled" message as a closing signal become out of sync, leaving tickets open indefinitely even though Zabbix has stopped escalating the problem.

Steps to Reproduce

• Create a test item and a trigger that references it.
• Create a Trigger action with escalation steps and "Notify about canceled escalations" enabled (default).
• Trigger a problem event.
• Let the problem be open on itsm 
• Disable the item (either manually or via LLD lifecycle rules)
• The problem disappears from Monitoring → Problems (filtered out because it belongs to a disabled item), but no "Escalation cancelled" notification is sent to the ITSM tool, and the ticket remains open despite the checkbox being marked.

Per documentation, with "Notify about canceled escalations" enabled, disabling the item should always generate an "Escalation cancelled" notification to prior recipients, allowing downstream ITSM systems to cleanly close the corresponding ticket.

Best Regards,
Lucas