Describe the bug
At the start of the call, the user's network changed (in our scenario, the user left the office and entered an elevator), switching from Wi-Fi to cellular, a brief network outage occurred.

• After the network was restored, a quick reconnection occurred, the WebSocket connection was completed, marked as {{1}} in log.

• A response (ParticipantUpdate) was received from the server, marked as {{2}} in log.

• The client then began constructing a state synchronization request (SyncState), but unfortunately, the actual remote track was not yet ready, marked as {{3}} in log.

  This caused an error in UpdateSubscription within SyncState. The incorrect UpdateSubscription is as follows:

  { "track_sids": ["TR_AMTuXiKoMxwLbW"], "subscribe": false }

• PeerConnection onTrack event fired, but it was too late, server is unsubscribing (LiveKit Server rtc/subscriptionmanager.go:181), then the user could no longer hear the sound, marked as {{4}} in log.

SDK Version
2.10.0

iOS/macOS Version
26.1

Logs
Please refer to the attachment and pay attention to the marked locations.

debug.log