Agent randomly doesn't get audio from the room (#705)

Author: Shubhrakanti

.changeset/ripe-moose-exist.md

@@ -0,0 +1,5 @@
+---
+'@livekit/agents': patch
+---
+
+bugfix: agent not recieving audio from room sometimes

agents/src/voice/room_io/_input.ts

@@ -1,8 +1,8 @@
 // SPDX-FileCopyrightText: 2025 LiveKit, Inc.
 //
 // SPDX-License-Identifier: Apache-2.0
+import type { AudioFrame } from '@livekit/rtc-node';
 import {
-  AudioFrame,
   AudioStream,
   type NoiseCancellationOptions,
   RemoteParticipant,
@@ -66,8 +66,10 @@ export class ParticipantAudioInputStream extends AudioInput {
         ? participant
         : this.room.remoteParticipants.get(participantIdentity);
 
+    // We need to check if the participant has a microphone track and subscribe to it
+    // in case we miss the tracksubscribed event
     if (participantValue) {
-      for (const publication of Object.values(participantValue.trackPublications)) {
+      for (const publication of participantValue.trackPublications.values()) {
         if (publication.track && publication.source === TrackSource.SOURCE_MICROPHONE) {
           this.onTrackSubscribed(publication.track, publication, participantValue);
           break;