Lifttime indicator not displayed

[Liki Lee]

According to Zabbix 5.0 online manual, "When discovered entities become 'Not discovered anymore', a lifetime indicator is displayed in the item list. Move your mouse pointer over it and a message will be displayed indicating how many days are left until the item is deleted."

However sometimes an item discovered by LLD is marked as "No Such Instance currently exists at this OID", but the lifetime indicator is not displayed.
The "Keep lost resources period" field of the corresponding discovery rule is set as 30 days.
Does anyone know why?

[Hamardaban]

I think this is because item could not get the data because there is no longer this id (red square), but LLD has not worked yet and "does not know" about unavailability (lifetime indicator ==yellow square).

[Liki Lee]

Thank Hamardaban for your help.

I am also told about another possibility. The lifetime indicator is not displayed after the configuration of the host (e.g. IFNAME) is changed.

[cyber]

Or your device does not return data for a query that discovery put together... It may be issue on your device side, that it fail to return specific data...