diff --git a/components/cast_streaming/renderer/frame/demuxer_connector.cc b/components/cast_streaming/renderer/frame/demuxer_connector.cc
index 547e5ef0d2ca6b..2a53854f99e5ec 100644
--- a/components/cast_streaming/renderer/frame/demuxer_connector.cc
+++ b/components/cast_streaming/renderer/frame/demuxer_connector.cc
@@ -43,7 +43,6 @@ void DemuxerConnector::SetDemuxer(FrameInjectingDemuxer* demuxer) {
 void DemuxerConnector::OnDemuxerDestroyed() {
   DVLOG(1) << __func__;
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  DCHECK(demuxer_);
 
   demuxer_ = nullptr;
   is_demuxer_initialized_ = false;
diff --git a/components/cast_streaming/renderer/frame/frame_injecting_demuxer.cc b/components/cast_streaming/renderer/frame/frame_injecting_demuxer.cc
index ec9fbd31e356e8..c3292419fa8217 100644
--- a/components/cast_streaming/renderer/frame/frame_injecting_demuxer.cc
+++ b/components/cast_streaming/renderer/frame/frame_injecting_demuxer.cc
@@ -325,11 +325,12 @@ FrameInjectingDemuxer::FrameInjectingDemuxer(
 FrameInjectingDemuxer::~FrameInjectingDemuxer() {
   DVLOG(1) << __func__;
 
-  if (was_initialization_successful_) {
-    original_task_runner_->PostTask(
-        FROM_HERE, base::BindOnce(&DemuxerConnector::OnDemuxerDestroyed,
-                                  base::Unretained(demuxer_connector_)));
-  }
+  // Always notify the connector so it can clear its raw |demuxer_| pointer.
+  // Skipping this when initialization failed left a dangling pointer that was
+  // dereferenced in DemuxerConnector::OnReceiverDisconnected().
+  original_task_runner_->PostTask(
+      FROM_HERE, base::BindOnce(&DemuxerConnector::OnDemuxerDestroyed,
+                                base::Unretained(demuxer_connector_)));
 }
 
 void FrameInjectingDemuxer::OnStreamsInitialized(