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[Bug]: Aggregation over time hides partial or empty data #1136

Description

@ralphm

Bug description

When a timeseries has gaps with empty data, when zooming out to the point that the gap would be aggregated into a single rendered data point, the empty or partial indicators are no longer shown. This removes a critical signal while troubleshooting issues.

Expected behavior

Aggregation over time must keep showing empty / partial.

Steps to reproduce

  1. Find a timeseries with a gap.
  2. Zoom out far enough that the gap is covered by a "pixel".
  3. See the indicators for partial / empty data go missing.

Screenshots

Last 10 days with gap

Image

Last 14 days without gap

Image

Error Logs

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Desktop

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Additional context

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Activity

  1. ralphm commented on Mar 6, 2026

    @ralphm
    MemberAuthor

    @ktsaou is this an aggregation issue at the Agent, in Cloud, or both?

  2. juacker commented on Mar 9, 2026

    @juacker
    Member

    @ralphm based on the issue description, I would say that the cloud is working as expected:

    1. in cloud we don't perform time-aggregations, the agent handles the downsampling.
    2. When aggregating point annotations between different series, we always keep any non null value, meaning that if a series that the cloud aggregates contains a non null value as partial data or overflow, we would set it.
  3. ralphm commented on Apr 14, 2026

    @ralphm
    MemberAuthor

    @stelfrag Can you have a look at this?

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