No data,Sometimes good and sometimes bad

[hzd2020]

Describe the bug
A clear and concise description of what the bug is.

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Network data
If it's related to metric data visualization would be great to get the raw query and response for the network request (check this in browser dev tools network tab, there you can see metric requests, please include the request body and request response)

Software versions

Grafana	Zabbix	Grafana-Zabbix Plugin
11.2	7.0.3	4.5.4

Use Zabbix Monitor Dell hardware information via snmp. in the grafana status panel, last 1 hours data view ok, last 30 minutes view no data.

some time view ok, some time view no data