# Mixpanel: Javascript SDK UTM persistence behavior change

> Mixpanel status incident “Javascript SDK UTM persistence behavior change” on 2024-05-29: impact minor (vendor’s label), 0 min, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/mixpanel/incidents/z703x0lmct03
Last updated: 2024-05-29T04:30:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2024-05-29 04:30 UTC · Resolved: 2024-05-29 04:30 UTC · Duration: 0 min
- Updates: 1
- [Vendor status page: https://www.mixpanelstatus.com/incidents/z703x0lmct03](https://www.mixpanelstatus.com/incidents/z703x0lmct03)
- [Company: Mixpanel](https://rewindex.com/company/mixpanel.md)

## Timeline of updates

- **resolved** 2024-05-29 04:30 UTC: Version v2.51.0 of our Javascript SDK included a change to the default behavior of UTM tracking which disabled the persistence of UTM properties as super properties. This resulted in events only having the UTM information tracked on them if that UTM information was present on the URL the event was triggered from unless the initialization option {stop\_utm\_persistence: false} was set. We've reverted this change so that UTM information is persisted as a super property in v2.52.0 which was released 6/7/2024 12PM PT. We recommend the {stop\_utm\_persistence: true} initialization option if you use multi-touch attribution models in Mixpanel. Please refer to our attribution documentation (https://docs.mixpanel.com/docs/features/attribution) for how to properly attribute data sent in during this time or reach out to our support team with further questions.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by Mixpanel, started 2024-05-29 04:30 UTC, resolved after 0 min, 1 update(s).

- Canonical URL: https://rewindex.com/company/mixpanel/incidents/z703x0lmct03
- Citation: Mixpanel, “Javascript SDK UTM persistence behavior change” (2024-05-29 04:30 UTC). Archived by Rewindex: https://rewindex.com/company/mixpanel/incidents/z703x0lmct03 (CC BY 4.0).
- Markdown link: `[Mixpanel: Javascript SDK UTM persistence behavior change (2024-05-29)](https://rewindex.com/company/mixpanel/incidents/z703x0lmct03)`


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Canonical: https://rewindex.com/company/mixpanel/incidents/z703x0lmct03 · Markdown: https://rewindex.com/company/mixpanel/incidents/z703x0lmct03.md · JSON: https://rewindex.com/api/v1/companies/mixpanel/incidents/z703x0lmct03 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:52:58.196Z