- access loggers: added GRPC_STATUS operator on logging format.
- fault: added support for controlling the percentage of requests that abort, delay and response rate limits faults are applied to using :ref:`HTTP headers <config_http_filters_fault_injection_http_header>` to the HTTP fault filter.
- http: fixed a bug where the upgrade header was not cleared on responses to non-upgrade requests. Can be reverted temporarily by setting runtime feature envoy.reloadable_features.fix_upgrade_response to false.
- tracing: tracing configuration has been made fully dynamic and every HTTP connection manager can now have a separate :ref:`tracing provider <envoy_v3_api_field_extensions.filters.network.http_connection_manager.v3.HttpConnectionManager.Tracing.provider>`.
- Tracing provider configuration as part of :ref:`bootstrap config <envoy_v3_api_field_config.bootstrap.v3.Bootstrap.tracing>` has been deprecated in favor of configuration as part of :ref:`HTTP connection manager <envoy_v3_api_field_extensions.filters.network.http_connection_manager.v3.HttpConnectionManager.Tracing.provider>`.