Reattaching images that broke:

As I understand from the description, the issue is that items that do not receive historical data remain in the Unsupported state. This is expected behavior. An item transitions to a normal state only when it receives new valid historical data.

Hi Tammy,
is there anything else we can help you with or this report can be closed?

Thanks!

BR,

Zabbix support

Thank you for the answer Alexander, so, just to make it clear for me: unsupported items have a similar behavior to problems, where it only reevaluates if receives new data even if there is no historical data at all for that item anymore?

Yes, items and triggers change their state only when new data is received. However, if a trigger expression contains a time-based function, such a trigger will be also recalculated every 30 seconds. See Triggers calculation time.

Thank you for the explanation. I will check if there are any feature requests related to this, but for now, you can close this ticket.
Have a great day

Suggestion: Add this information about unsupported items to the documentation. I could not find anything related to that there

Thank you for the suggestion. We will add this to the documentation.

Updated documentation:

• Creating an item: 6.0, 7.0, 7.2, 7.4 (The "Unsupported items" section has been updated).