Tooltip of last data point shows up for older data points

[ysakkk]

I got same following.

• Tooltip of last data point shows up for older data points #4514
  Tooltip of last data point shows up for older data points grafana#4514

• Feature Request: Option to hide zero values in legend and tooltip Alerts sum doesn't match #1381
  Feature Request: Option to hide zero values in legend and tooltip grafana#1381

It's seems can't use fill(0), fill(null) on grafana-zabbix.
I want to hide null data.
What should i do?

Zabbix: 4.2.8
Grafana: 7.1.5
Grafana-Zabbix Plugin: 4.0.1

[github-actions]

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