fix(replay): add targetSessionId to avoid session rotation bugs #2810

ksvat · 2025-12-22T22:53:38Z

Problem

we're still seeing some instances of session IDs not rotating properly, there seems to be some subtle timing issue that happens some of the time.

Changes

This aims to be more explicit about what sessionID should be used, rather than rely on this.session_id, which is updated at various points in this flow and i suspect can be momentarily out of date?

Release info Sub-libraries affected

Libraries affected

Checklist

Tests for new code
Accounted for the impact of any changes across different platforms
Accounted for backwards compatibility of any changes (no breaking changes!)
Took care not to unnecessarily increase the bundle size

If releasing new changes

Ran pnpm changeset to generate a changeset file
Added the "release" label to the PR to indicate we're publishing new versions for the affected packages

vercel · 2025-12-22T22:53:40Z

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
posthog-js	Ready	Preview	Dec 23, 2025 2:16pm
posthog-nextjs-config	Ready	Preview	Dec 23, 2025 2:16pm

ksvat · 2025-12-22T22:53:57Z

fix(replay): add targetSessionId to avoid session rotation bugs #2810 👈 (View in Graphite)
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github-actions · 2025-12-22T22:58:00Z

Download bundle size visualization

github-actions · 2025-12-22T23:01:32Z

Size Change: +474 B (+0.01%)

Total Size: 5.38 MB

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greptile-apps · 2025-12-23T14:19:52Z

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pauldambra

looks good to me 🚀

github-actions · 2026-01-05T09:42:23Z

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week.

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fix(replay): add targetSessionId to avoid session rotation bugs

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fix(replay): add targetSessionId to avoid session rotation bugs #2810

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