diff --git a/api/audio/echo_canceller3_config.h b/api/audio/echo_canceller3_config.h
index 96a204a981..4b1c7fbc47 100644
--- a/api/audio/echo_canceller3_config.h
+++ b/api/audio/echo_canceller3_config.h
@@ -59,7 +59,7 @@ struct RTC_EXPORT EchoCanceller3Config {
     };
     AlignmentMixing render_alignment_mixing = {false, true, 10000.f, true};
     AlignmentMixing capture_alignment_mixing = {false, true, 10000.f, false};
-    bool detect_pre_echo = false;
+    bool detect_pre_echo = true;
   } delay;
 
   struct Filter {
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 810b0ae185..ae9c8736ae 100644
--- a/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc
+++ b/modules/audio_processing/aec3/echo_path_delay_estimator_unittest.cc
@@ -71,7 +71,6 @@ TEST(EchoPathDelayEstimator, DelayEstimation) {
   constexpr int kSampleRateHz = 48000;
   constexpr size_t kNumBands = NumBandsForRate(kSampleRateHz);
 
-  Random random_generator(42U);
   Block render(kNumBands, kNumRenderChannels);
   Block capture(/*num_bands=*/1, kNumCaptureChannels);
   ApmDataDumper data_dumper(0);
@@ -82,6 +81,9 @@ TEST(EchoPathDelayEstimator, DelayEstimation) {
     config.delay.down_sampling_factor = down_sampling_factor;
     config.delay.num_filters = 10;
     for (size_t delay_samples : {30, 64, 150, 200, 800, 4000}) {
+      // Random generator become periodic after a while. To avoid issue in the
+      // unittest we ensure to seed it for every case.
+      Random random_generator(42U);
       SCOPED_TRACE(ProduceDebugText(delay_samples, down_sampling_factor));
       std::unique_ptr<RenderDelayBuffer> render_delay_buffer(
           RenderDelayBuffer::Create(config, kSampleRateHz, kNumRenderChannels));