diff --git a/modules/audio_processing/aec3/echo_path_delay_estimator.cc b/modules/audio_processing/aec3/echo_path_delay_estimator.cc
index 21c3d193f8..0026522d53 100644
--- a/modules/audio_processing/aec3/echo_path_delay_estimator.cc
+++ b/modules/audio_processing/aec3/echo_path_delay_estimator.cc
@@ -48,6 +48,8 @@ void EchoPathDelayEstimator::Reset(bool soft_reset) {
     matched_filter_lag_aggregator_.Reset();
   }
   matched_filter_.Reset();
+  old_aggregated_lag_ = rtc::nullopt;
+  consistent_estimate_counter_ = 0;
 }
 
 rtc::Optional<DelayEstimate> EchoPathDelayEstimator::EstimateDelay(
@@ -84,6 +86,19 @@ rtc::Optional<DelayEstimate> EchoPathDelayEstimator::EstimateDelay(
   if (aggregated_matched_filter_lag) {
     aggregated_matched_filter_lag->delay *= down_sampling_factor_;
   }
+
+  if (old_aggregated_lag_ && aggregated_matched_filter_lag &&
+      old_aggregated_lag_->delay == aggregated_matched_filter_lag->delay) {
+    ++consistent_estimate_counter_;
+  } else {
+    consistent_estimate_counter_ = 0;
+  }
+  old_aggregated_lag_ = aggregated_matched_filter_lag;
+  constexpr size_t kNumBlocksPerSecondBy2 = kNumBlocksPerSecond / 2;
+  if (consistent_estimate_counter_ > kNumBlocksPerSecondBy2) {
+    Reset(true);
+  }
+
   return aggregated_matched_filter_lag;
 }
 
diff --git a/modules/audio_processing/aec3/echo_path_delay_estimator.h b/modules/audio_processing/aec3/echo_path_delay_estimator.h
index 3277f198a1..6389098102 100644
--- a/modules/audio_processing/aec3/echo_path_delay_estimator.h
+++ b/modules/audio_processing/aec3/echo_path_delay_estimator.h
@@ -55,6 +55,8 @@ class EchoPathDelayEstimator {
   Decimator capture_decimator_;
   MatchedFilter matched_filter_;
   MatchedFilterLagAggregator matched_filter_lag_aggregator_;
+  rtc::Optional<DelayEstimate> old_aggregated_lag_;
+  size_t consistent_estimate_counter_ = 0;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(EchoPathDelayEstimator);
 };
diff --git a/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc b/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc
index acd7993782..38f31c9ea6 100644
--- a/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc
+++ b/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc
@@ -84,8 +84,12 @@ TEST(EchoPathDelayEstimator, DelayEstimation) {
 
         render_delay_buffer->PrepareCaptureProcessing();
 
-        estimated_delay_samples = estimator.EstimateDelay(
+        auto estimate = estimator.EstimateDelay(
             render_delay_buffer->GetDownsampledRenderBuffer(), capture);
+
+        if (estimate) {
+          estimated_delay_samples = estimate;
+        }
       }
 
       if (estimated_delay_samples) {