diff --git a/dom/audiochannel/AudioChannelAgent.cpp b/dom/audiochannel/AudioChannelAgent.cpp
index 5d218996ed06..4ca36656ff68 100644
--- a/dom/audiochannel/AudioChannelAgent.cpp
+++ b/dom/audiochannel/AudioChannelAgent.cpp
@@ -354,3 +354,10 @@ AudioChannelAgent::WindowAudioCaptureChanged(uint64_t aInnerWindowID,
 
   callback->WindowAudioCaptureChanged(aCapture);
 }
+
+bool
+AudioChannelAgent::IsPlayingStarted() const
+{
+  return mIsRegToService;
+}
+
diff --git a/dom/audiochannel/AudioChannelAgent.h b/dom/audiochannel/AudioChannelAgent.h
index 10cbec1ac080..8e844a16007e 100644
--- a/dom/audiochannel/AudioChannelAgent.h
+++ b/dom/audiochannel/AudioChannelAgent.h
@@ -48,6 +48,8 @@ public:
   uint64_t WindowID() const;
   uint64_t InnerWindowID() const;
 
+  bool IsPlayingStarted() const;
+
 private:
   virtual ~AudioChannelAgent();
 
diff --git a/dom/html/HTMLMediaElement.cpp b/dom/html/HTMLMediaElement.cpp
index 4de1ea2a1a0b..24ac87bab8a7 100644
--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -6430,7 +6430,9 @@ HTMLMediaElement::SetAudibleState(bool aAudible)
 void
 HTMLMediaElement::NotifyAudioPlaybackChanged(AudibleChangedReasons aReason)
 {
-  if (!mAudioChannelAgent) {
+  MOZ_ASSERT(mAudioChannelAgent);
+
+  if (!mAudioChannelAgent->IsPlayingStarted()) {
     return;
   }
 
@@ -6554,16 +6556,17 @@ HTMLMediaElement::SetMediaInfo(const MediaInfo& aInfo)
 void
 HTMLMediaElement::AudioCaptureStreamChangeIfNeeded()
 {
-  // Window audio capturing only happens after creating audio channel agent.
-  if (!mAudioChannelAgent) {
-    return;
-  }
+  MOZ_ASSERT(mAudioChannelAgent);
 
   // No need to capture a silence media element.
   if (!HasAudio()) {
     return;
   }
 
+  if (!mAudioChannelAgent->IsPlayingStarted()) {
+    return;
+  }
+
   if (mAudioCapturedByWindow && !mCaptureStreamPort) {
     nsCOMPtr<nsPIDOMWindowInner> window = OwnerDoc()->GetInnerWindow();
     if (!OwnerDoc()->GetInnerWindow()) {