Top function does not work if number of series less than provided N

[giovanny07]

Describe the bug
Top function does not work with bar indicator

Expected behavior
When the top function is assigned to a panel with x values, it will stop displaying if the top value is greater than the one obtained by the plugin.

For example: Image 1 has top 5 and gives nodata while image 2 has top 2 and gives data.

Screenshots

Software versions

Grafana	Zabbix	Grafana-Zabbix Plugin
8.1.1	5.4.3	4.2.1

[mjtrangoni]

I can confirm the same for,

Grafana	Zabbix	Grafana-Zabbix Plugin
8.1.1	5.0.11	4.2.1

The Query Inspector says,

response:Object
message:"Metric request error"