[sentry]

Problem

When navigating across a replay playlist (e.g. from a mobile video replay to a web rrweb replay), the ReplayContextProvider remains mounted. replayerRef.current keeps holding the old VideoReplayerWithInteractions instance. The rrweb replayer initialization effect assumes any existing replayer is an rrweb Replayer and attempts to read replayerRef.current.wrapper.parentElement. Because VideoReplayerWithInteractions does not expose a .wrapper property, this throws TypeError: Cannot read properties of undefined (reading 'parentElement').

Similarly, going in the opposite direction (rrweb to video) would cause the video replayer initialization to be skipped entirely because it checks !replayerRef.current.

Fix

• Track the mounted replayer type (isVideoReplayerRef) in replayContext.tsx.
• When isVideoReplay changes and no longer matches the mounted replayer, destroy the existing replayer, null out replayerRef.current, and reset player UI state (isPlaying, fastForwardSpeed, isVideoBuffering) that would otherwise remain stale.
• Allow the respective initialization effects to re-create the correct replayer type.
• Add unit tests covering switching between video and rrweb replays in both directions, and verifying that UI state like fast-forward speed is reset.

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

Fixes JAVASCRIPT-3FX8

_{@sentry <feedback>: Autofix iterates on these changes
@sentry stop iterating: Autofix stops iterating on this run}

_{This PR was automatically generated by Sentry. You can adjust this setting at any time.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit dddf465. Configure here.}

[getsantry]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you remove the label Waiting for: Community, I will leave it alone ... forever!

---

"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀