Livevalue to late

Grafana Gauge Panel
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1

I have a gauge as a live value. these are set to: Last* non Null value.
Is the only difference to “last” that no “zero” is displayed?

But my question is: the values ​​lag behind for quite a long time.
Is it possible to use a live value at all?
For example, I currently have the following query:

from(bucket: "iobroker")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r["_measurement"] == "alias.0.PV-Anlage.Leistung.WirkleistungPv")
  |> filter(fn: (r) => r["_field"] == "value")
  |> aggregateWindow(every: v.windowPeriod, fn: mean, createEmpty: false)
  |> yield(name: "mean")