fix: dynascale manager doesnt pick up updated dimensions all the time

[santhoshvai]

💡 Overview

const changes = call.state.updateParticipantTracks(trackType, {
          [participantSessionId]: { dimension },
});

changes object show that changes are reflected in the call state

call.dynascaleManager.applyTrackSubscriptions();

but dynascale manager, does not read the participant update.. it still shows that participant dimensions are undefined

📝 Implementation notes

The root cause is shareReplay({ refCount: true }) on remoteParticipants$. When there are no active subscribers:

• The observable disconnects from the source
• When getCurrentValue re-subscribes, there might be micro-task timing issues in React Native
• The getter reads before the observable pipe completes
  The proper fix is to make the trackSubscriptions getter read directly from the BehaviorSubject, bypassing the shareReplay:

🎫 Ticket: https://linear.app/stream/issue/XYZ-123

📑 Docs: https://github.com/GetStream/docs-content/pull/

[Copilot]

Pull Request Overview

This PR fixes a timing issue in the DynascaleManager where participant dimension updates were not being picked up reliably due to stale data from RxJS shareReplay with refCount: true.

Key Changes:

• Introduced getParticipantsSnapshot() method in CallState to bypass the observable pipeline and read directly from the BehaviorSubject
• Updated DynascaleManager to use the snapshot method, avoiding stale data when there are no active subscribers
• Fixed TrackSubscriber to properly unsubscribe from tracks when participants stop publishing

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/client/src/store/CallState.ts	Added getParticipantsSnapshot() method to provide synchronous access to participants data, bypassing potential timing issues with shareReplay
packages/client/src/helpers/DynascaleManager.ts	Updated trackSubscriptions getter to use getParticipantsSnapshot() and optimized by caching videoTrackSubscriptionOverrides lookup, includes explicit local participant filtering
packages/react-native-sdk/src/components/Participant/ParticipantView/VideoRenderer/TrackSubscriber.tsx	Added !isPublishing condition to unsubscribe when participant stops publishing, removed redundant distinctUntilChanged() operator

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[Copilot]

The comment states "isPublishing is not used here" but it is now being used in the condition on line 89 (!isVisible || !isPublishing). Please update the comment to reflect the actual usage, for example: "isPublishing is used to unsubscribe when the participant stops publishing, and to re-subscribe when they start publishing again".

Suggested change

	// isPublishing is not used here, but we need to keep it for the subscription
	// to send the dimensions again when the participant starts publishing the track again
	// isPublishing is used to unsubscribe when the participant stops publishing,
	// and to re-subscribe when they start publishing again, ensuring dimensions are sent appropriately.