diff --git a/quic/core/quic_framer.cc b/quic/core/quic_framer.cc
index 5813010..dd880d7 100644
--- a/quic/core/quic_framer.cc
+++ b/quic/core/quic_framer.cc
@@ -1618,26 +1618,14 @@
     return;
   }
 
-  if (GetQuicReloadableFlag(quic_minimum_validation_of_coalesced_packets)) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_minimum_validation_of_coalesced_packets);
-    if (coalesced_header.destination_connection_id !=
-        header.destination_connection_id) {
-      // Drop coalesced packets with mismatched connection IDs.
-      QUIC_DLOG(INFO) << ENDPOINT << "Received mismatched coalesced header "
-                      << coalesced_header << " previous header was " << header;
-      QUIC_CODE_COUNT(
-          quic_received_coalesced_packets_with_mismatched_connection_id);
-      return;
-    }
-  } else {
-    if (coalesced_header.destination_connection_id !=
-            header.destination_connection_id ||
-        (coalesced_header.form != IETF_QUIC_SHORT_HEADER_PACKET &&
-         coalesced_header.version != header.version)) {
-      QUIC_PEER_BUG << ENDPOINT << "Received mismatched coalesced header "
+  if (coalesced_header.destination_connection_id !=
+      header.destination_connection_id) {
+    // Drop coalesced packets with mismatched connection IDs.
+    QUIC_DLOG(INFO) << ENDPOINT << "Received mismatched coalesced header "
                     << coalesced_header << " previous header was " << header;
-      return;
-    }
+    QUIC_CODE_COUNT(
+        quic_received_coalesced_packets_with_mismatched_connection_id);
+    return;
   }
 
   QuicEncryptedPacket coalesced_packet(coalesced_data, coalesced_data_length,
diff --git a/quic/core/quic_framer_test.cc b/quic/core/quic_framer_test.cc
index 71becf3..840cd31 100644
--- a/quic/core/quic_framer_test.cc
+++ b/quic/core/quic_framer_test.cc
@@ -12440,7 +12440,6 @@
   if (!QuicVersionHasLongHeaderLengths(framer_.transport_version())) {
     return;
   }
-  SetQuicReloadableFlag(quic_minimum_validation_of_coalesced_packets, true);
   SetDecrypterLevel(ENCRYPTION_ZERO_RTT);
   // clang-format off
   unsigned char packet[] = {
@@ -13112,12 +13111,7 @@
 
   QuicEncryptedPacket encrypted(AsChars(p), p_length, false);
 
-  if (GetQuicReloadableFlag(quic_minimum_validation_of_coalesced_packets)) {
-    EXPECT_TRUE(framer_.ProcessPacket(encrypted));
-  } else {
-    EXPECT_QUIC_PEER_BUG(EXPECT_TRUE(framer_.ProcessPacket(encrypted)),
-                         "Server: Received mismatched coalesced header.*");
-  }
+  EXPECT_TRUE(framer_.ProcessPacket(encrypted));
 
   EXPECT_THAT(framer_.error(), IsQuicNoError());
   ASSERT_TRUE(visitor_.header_.get());