diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index 8b98c9b..661e8fb 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -90,7 +90,7 @@
 // If true, require handshake confirmation for QUIC connections, functionally disabling 0-rtt handshakes.
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_require_handshake_confirmation, false)
 // If true, reset per packet state before processing undecryptable packets.
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_reset_per_packet_state_for_undecryptable_packets, false)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_reset_per_packet_state_for_undecryptable_packets, true)
 // If true, send PATH_RESPONSE upon receiving PATH_CHALLENGE regardless of perspective. --gfe2_reloadable_flag_quic_start_peer_migration_earlier has to be true before turn on this flag.
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_send_path_response2, true)
 // If true, set burst token to 2 in cwnd bootstrapping experiment.