Breakdown by cohort effectively filters rather than breaking down

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#5,565 opened on Aug 12, 2021 16 comments 0 reactions 0 assignees View on GitHub

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enhancement feature/cohorts feature/feature-flags feature/funnels team/feature-flags

Dominant language: Python
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Description

Bug description

If I break down by a cohort I see a filtered version of the funnel rather than one that breaks down incohort vs outside of cohort

https://app.posthog.com/insights?insight=FUNNELS&properties=%5B%5D&filter_test_accounts=true&events=%5B%7B%22id%22%3A%22first%20team%20event%20ingested%22%2C%22name%22%3A%22first%20team%20event%20ingested%22%2C%22type%22%3A%22events%22%2C%22order%22%3A1%7D%5D&actions=%5B%7B%22id%22%3A%222674%22%2C%22name%22%3A%22User%20Signed%20Up%20(Comprehensive)%22%2C%22type%22%3A%22actions%22%2C%22order%22%3A0%7D%2C%7B%22id%22%3A%224912%22%2C%22name%22%3A%22Discovered%20Learning%22%2C%22type%22%3A%22actions%22%2C%22order%22%3A2%7D%5D&funnel_viz_type=steps&display=FunnelViz&interval=day&breakdown=%5B320%5D&breakdown_type=cohort&new_entity=%5B%5D&date_from=-90d

Expected behavior

I would expect to see the funnel broken down by
In Cohort X: True, False

But I see it broken down by
In Cohort X: True (only)

Which is effectively the same as the filter functionality

How to reproduce

https://app.posthog.com/insights?insight=FUNNELS&properties=%5B%5D&filter_test_accounts=true&events=%5B%7B%22id%22%3A%22first%20team%20event%20ingested%22%2C%22name%22%3A%22first%20team%20event%20ingested%22%2C%22type%22%3A%22events%22%2C%22order%22%3A1%7D%5D&actions=%5B%7B%22id%22%3A%222674%22%2C%22name%22%3A%22User%20Signed%20Up%20(Comprehensive)%22%2C%22type%22%3A%22actions%22%2C%22order%22%3A0%7D%2C%7B%22id%22%3A%224912%22%2C%22name%22%3A%22Discovered%20Learning%22%2C%22type%22%3A%22actions%22%2C%22order%22%3A2%7D%5D&funnel_viz_type=steps&display=FunnelViz&interval=day&breakdown=%5B320%5D&breakdown_type=cohort&new_entity=%5B%5D&date_from=-90d

Environment

PostHog Cloud
self-hosted PostHog, version/commit: please provide

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Research direction

Use the linked PostHog funnel URL as the entry point and reproduce the cohort breakdown behavior described in the issue. Trace how the funnel handles the cohort breakdown, then verify that the result shows both “In Cohort X: True” and “In Cohort X: False” rather than only the cohort members.

Written by the indexing model from the issue text.

Assessment

Domain: analytics
Issue type: Bug
Difficulty: 4/5
Estimated time: 3-5 days
Activity status: Stale
Clarity: Mostly clear
Newbie friendliness: 35/100