diff --git a/doc/admin-guide/files/records.config.en.rst b/doc/admin-guide/files/records.config.en.rst
index 8176406..ea7dfb8 100644
--- a/doc/admin-guide/files/records.config.en.rst
+++ b/doc/admin-guide/files/records.config.en.rst
@@ -1091,11 +1091,10 @@
 .. ts:cv:: CONFIG proxy.config.http.request_buffer_enabled INT 0
    :overridable:
 
-   This is a configuration value that is overridable but not configurable. This is most likely an
-   implementation error.
-
    This enables buffering the content for incoming ``POST`` requests. If enabled no outbound
    connection is made until the entire ``POST`` request has been buffered.
+   If enabled, `proxy.config.http.post_copy_size` needs to be set to the maximum of the post body
+   size allowed, otherwise, the post would fail.
 
 .. ts:cv:: CONFIG proxy.config.http.request_line_max_size INT 65535
 
diff --git a/mgmt/RecordsConfig.cc b/mgmt/RecordsConfig.cc
index e31cdbb..62547c0 100644
--- a/mgmt/RecordsConfig.cc
+++ b/mgmt/RecordsConfig.cc
@@ -339,6 +339,8 @@
   ,
   {RECT_CONFIG, "proxy.config.http.keep_alive_post_out", RECD_INT, "1", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
   ,
+  {RECT_CONFIG, "proxy.config.http.request_buffer_enabled", RECD_INT, "0", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
+  ,
   {RECT_CONFIG, "proxy.config.http.chunking_enabled", RECD_INT, "1", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
   ,
   {RECT_CONFIG, "proxy.config.http.chunking.size", RECD_INT, "4096", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
diff --git a/proxy/http/HttpSM.cc b/proxy/http/HttpSM.cc
index 8b7044e..43574d3 100644
--- a/proxy/http/HttpSM.cc
+++ b/proxy/http/HttpSM.cc
@@ -3477,12 +3477,10 @@
     //   server and close the ua
     p->handler_state = HTTP_SM_POST_UA_FAIL;
     set_ua_abort(HttpTransact::ABORTED, event);
-
+    p->vc->do_io_write(nullptr, 0, nullptr);
+    p->vc->do_io_shutdown(IO_SHUTDOWN_READ);
     tunnel.chain_abort_all(p);
     server_session = nullptr;
-    p->read_vio    = nullptr;
-    p->vc->do_io_close(EHTTP_ERROR);
-
     // the in_tunnel status on both the ua & and
     //   it's consumer must already be set to true.  Previously
     //   we were setting it again to true but incorrectly in
diff --git a/proxy/http/HttpTransact.cc b/proxy/http/HttpTransact.cc
index 2fbf7be..f5898f0 100644
--- a/proxy/http/HttpTransact.cc
+++ b/proxy/http/HttpTransact.cc
@@ -1118,7 +1118,7 @@
 {
   TxnDebug("http_trans", "START HttpTransact::HandleRequest");
 
-  if (!s->state_machine->is_waiting_for_full_body) {
+  if (!s->state_machine->is_waiting_for_full_body && !s->state_machine->is_using_post_buffer) {
     ink_assert(!s->hdr_info.server_request.valid());
 
     HTTP_INCREMENT_DYN_STAT(http_incoming_requests_stat);