diff --git a/modules/congestion_controller/goog_cc/loss_based_bwe_v2.cc b/modules/congestion_controller/goog_cc/loss_based_bwe_v2.cc
index 616fe710c8..d13e23d1b4 100644
--- a/modules/congestion_controller/goog_cc/loss_based_bwe_v2.cc
+++ b/modules/congestion_controller/goog_cc/loss_based_bwe_v2.cc
@@ -838,9 +838,10 @@ bool LossBasedBweV2::PushBackObservation(
       last_send_time - last_send_time_most_recent_observation_;
 
   // Too small to be meaningful.
-  if (observation_duration < config_->observation_duration_lower_bound &&
-      (delay_detector_state == BandwidthUsage::kBwNormal ||
-       !config_->trendline_integration_enabled)) {
+  if (observation_duration <= TimeDelta::Zero() ||
+      (observation_duration < config_->observation_duration_lower_bound &&
+       (delay_detector_state == BandwidthUsage::kBwNormal ||
+        !config_->trendline_integration_enabled))) {
     return false;
   }
 
diff --git a/modules/congestion_controller/goog_cc/loss_based_bwe_v2_test.cc b/modules/congestion_controller/goog_cc/loss_based_bwe_v2_test.cc
index 55de52d9c9..dbe745745e 100644
--- a/modules/congestion_controller/goog_cc/loss_based_bwe_v2_test.cc
+++ b/modules/congestion_controller/goog_cc/loss_based_bwe_v2_test.cc
@@ -581,5 +581,39 @@ TEST(LossBasedBweV2Test, NotUseAckedBitrateInNormalState) {
             acked_bitrate);
 }
 
+TEST(LossBasedBweV2Test, NoUpdateIfObservationDurationUnchanged) {
+  PacketResult enough_feedback_1[2];
+  enough_feedback_1[0].sent_packet.size = DataSize::Bytes(15'000);
+  enough_feedback_1[1].sent_packet.size = DataSize::Bytes(15'000);
+  enough_feedback_1[0].sent_packet.send_time = Timestamp::Zero();
+  enough_feedback_1[1].sent_packet.send_time =
+      Timestamp::Zero() + kObservationDurationLowerBound;
+  enough_feedback_1[0].receive_time =
+      Timestamp::Zero() + kObservationDurationLowerBound;
+  enough_feedback_1[1].receive_time =
+      Timestamp::Zero() + 2 * kObservationDurationLowerBound;
+
+  ExplicitKeyValueConfig key_value_config(
+      Config(/*enabled=*/true, /*valid=*/true));
+  LossBasedBweV2 loss_based_bandwidth_estimator(&key_value_config);
+
+  loss_based_bandwidth_estimator.SetBandwidthEstimate(
+      DataRate::KilobitsPerSec(600));
+  DataRate acked_bitrate = DataRate::KilobitsPerSec(300);
+  loss_based_bandwidth_estimator.SetAcknowledgedBitrate(acked_bitrate);
+  loss_based_bandwidth_estimator.UpdateBandwidthEstimate(
+      enough_feedback_1, DataRate::PlusInfinity(), BandwidthUsage::kBwNormal);
+  DataRate current_estimate =
+      loss_based_bandwidth_estimator.GetBandwidthEstimate(
+          /*delay_based_limit=*/DataRate::PlusInfinity());
+
+  // Use the same feedback and check if the estimate is unchanged.
+  loss_based_bandwidth_estimator.UpdateBandwidthEstimate(
+      enough_feedback_1, DataRate::PlusInfinity(), BandwidthUsage::kBwNormal);
+  DataRate new_estimate = loss_based_bandwidth_estimator.GetBandwidthEstimate(
+      /*delay_based_limit=*/DataRate::PlusInfinity());
+  EXPECT_EQ(current_estimate, new_estimate);
+}
+
 }  // namespace
 }  // namespace webrtc