Bug in displaying values after pivot

[joeri-s]

When querying the data in raw_data.csv, the values dissapear after the final pivot step. Adding the data to InfluxDB and doing the same query there confirms that the pivot results in the correct data. The fact that it doesn't show in Fluxtreme while it should be there, suggest some formatting or display bug.

Before pivot:

After pivot:

Data

raw_data.csv

The full query

import "date"

from(bucket: "kpi")
    |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
    |> filter(fn: (r) => r["name"] == "ms_distance")
    |> pivot(rowKey: ["_time"], columnKey: ["_field"], valueColumn: "_value")
    |> group(columns: ["_time"])
    |> map(fn: (r) => ({
        r with
            index: int(v: r.index),
            measurement_time: time(v: int(v: r.measurement_start*1000000000.0)),
            location: string(v: "(" + string(v: r.location_x) + ", " + string(v: r.location_y) + ")")
    }))
    |> keep(columns: ["index", "measurement_time", "location", "offset_value"])
    |> sort(columns: ["index"])
    |> pivot(rowKey: ["measurement_time"], columnKey: ["location"], valueColumn: "offset_value")