diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index a1f1b25..15f6d29 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -41,7 +41,7 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_enable_mtu_discovery_at_server, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_enable_server_on_wire_ping, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_enable_token_based_address_validation, true)
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_encrypted_control_frames, true)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_encrypted_control_frames, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_encrypted_goaway, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_extract_x509_subject_using_certificate_view, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_fix_willing_and_able_to_write2, true)
@@ -58,7 +58,7 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_send_timestamps, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_send_tls_crypto_error_code, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_send_version_negotiation_for_short_connection_ids, true)
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_single_ack_in_packet2, true)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_single_ack_in_packet2, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_split_up_send_rst_2, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_start_peer_migration_earlier, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_testonly_default_false, false)
@@ -68,7 +68,7 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_unified_iw_options, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_circular_deque_for_unacked_packets_v2, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_encryption_level_context, true)
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_write_or_buffer_data_at_level, true)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_write_or_buffer_data_at_level, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_send_quic_fallback_server_config_on_leto_error, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_dont_fetch_quic_private_keys_from_leto, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_http2_parse_priority_update_frame, true)