Zabbix keep getting alert from a trigger i created while everything is ok

[Ebsys]

Zabbix keep getting alert from a trigger i created

"Zabbix agent is not available for N minutes (or no data for N minutes)"

it's only doing that to one single host while the host is running fine and agent.ping can get a response, all other server with the exact same trigger work just as inteeded

I also set a recovery expression on it, the trigger fire and then it says after like 30s "problem resolved in -9m -50s at 10:58" while it's 11:08, why is it a negative value and why does it always resolve in the same time range? (-9m -50s to -9m -55s)

the host in question is 10 min backward when i check the clock on it, is it due to that? but i dont get why it automatically trigger when everything is fine

[kingpin]

If the issue occurs only on one host, I would start by focusing on time synchronization.

The fact that the host's clock is 10 minutes behind is a significant clue. Zabbix relies heavily on accurate time synchronization for its triggers and alerts.
f the clock on the host is not correctly synchronized with the Zabbix server (or with a standard time source), it can lead to anomalies in trigger activation and reporting.

[Ebsys]

that was indeed the issue, thanks

[kingpin]

If the issue occurs only on one host, I would start by focusing on time synchronization.

The fact that the host's clock is 10 minutes behind is a significant clue. Zabbix relies heavily on accurate time synchronization for its triggers and alerts.
f the clock on the host is not correctly synchronized with the Zabbix server (or with a standard time source), it can lead to anomalies in trigger activation and reporting.

[Ebsys]

that was indeed the issue, thanks

[markosa]

Set clock to time and check if it fixes that issue.