ESPV2 1.49.0 Envoy bug removed guard prohibit_route_refresh_after_response_headers_sent

[kwokhei]

Since updated to ESPV2 version 1.49.0, we noticed the errors below in the log. I took a look at Envoy issues but couldnt find any issue related to this. Just wondering if it is an issue with Envoy or a misconfiguration somewhere?

[22][envoy_bug]#14 UNKNOWN [0x7d8b9bb74510]
[22][envoy_bug]#13 main [0x55ab26e33daa]
[22][envoy_bug]#12 Envoy::MainCommon::main() [0x55ab26e36cb0]
[22][envoy_bug]#11 Envoy::MainCommon::MainCommon() [0x55ab26e36b5b]
[22][envoy_bug]#10 Envoy::MainCommonBase::MainCommonBase() [0x55ab26e36295]
[22][envoy_bug]#9 Envoy::StrippedMainBase::StrippedMainBase() [0x55ab26e572cb]
[22][envoy_bug]#8 std::_Function_handler<>::_M_invoke() [0x55ab26e3a330]
[22][envoy_bug]#7 Envoy::Server::InstanceBase::initialize() [0x55ab26fc06e4]
[22][envoy_bug]#6 Envoy::Server::InstanceBase::initializeOrThrow() [0x55ab26fc468c]
[22][envoy_bug]#5 Envoy::ProdComponentFactory::createRuntime() [0x55ab26e56ab4]
[22][envoy_bug]#4 Envoy::Server::InstanceUtil::createRuntime() [0x55ab26fc9696]
[22][envoy_bug]#3 Envoy::Runtime::LoaderImpl::LoaderImpl() [0x55ab27ab6ae1]
[22][envoy_bug]#2 Envoy::Runtime::LoaderImpl::loadNewSnapshot() [0x55ab27ab7a2d]
[22][envoy_bug]#1 Envoy::Runtime::LoaderImpl::createNewSnapshot() [0x55ab27ab9afd]
[22][envoy_bug]#0 Envoy::Runtime::ProtoLayer::ProtoLayer() [0x55ab27ab5cbd]
[22][envoy_bug]stacktrace for envoy bug
[22][envoy_bug]envoy bug failure: false. Details: Using a removed guard envoy.reloadable_features.prohibit_route_refresh_after_response_headers_sent. In future version of Envoy this will be treated as invalid configuration