diff --git a/apps/gateway/sdkconfig.old b/apps/gateway/sdkconfig.old
index 6b7be51..1d97f53 100644
--- a/apps/gateway/sdkconfig.old
+++ b/apps/gateway/sdkconfig.old
@@ -699,7 +699,7 @@ CONFIG_GATEWAY_KNX_TP_RX_PIN=-1
 CONFIG_GATEWAY_KNX_TP_BAUDRATE=19200
 CONFIG_GATEWAY_KNX_TP_STARTUP_TIMEOUT_MS=2000
 CONFIG_GATEWAY_KNX_TP_UART_9BIT_MODE=y
-# CONFIG_GATEWAY_KNX_TP_FULL_IP_FORWARD is not set
+CONFIG_GATEWAY_KNX_TP_FULL_IP_FORWARD=y
 CONFIG_GATEWAY_BRIDGE_KNX_TASK_STACK_SIZE=12288
 CONFIG_GATEWAY_BRIDGE_KNX_TASK_PRIORITY=5
 CONFIG_GATEWAY_CLOUD_BRIDGE_SUPPORTED=y
diff --git a/components/gateway_knx/src/gateway_knx.cpp b/components/gateway_knx/src/gateway_knx.cpp
index 26a9bdf..6771673 100644
--- a/components/gateway_knx/src/gateway_knx.cpp
+++ b/components/gateway_knx/src/gateway_knx.cpp
@@ -550,6 +550,10 @@ std::optional<DecodedGroupWrite> DecodeOpenKnxGroupWrite(const uint8_t* data, si
   return out;
 }
 
+bool IsOpenKnxGroupValueWrite(const uint8_t* data, size_t len) {
+  return DecodeOpenKnxGroupWrite(data, len).has_value();
+}
+
 uint8_t Reg1PercentToArc(uint8_t value) {
   if (value == 0 || value == 0xff) {
     return value;
@@ -3430,9 +3434,10 @@ void GatewayKnxTpIpRouter::handleTunnellingRequest(const uint8_t* packet_data, s
   const uint8_t* cemi = frame.data();
   const size_t cemi_len = frame.dataLength();
   const std::vector<uint8_t> current_cemi(cemi, cemi + cemi_len);
+  const bool is_group_value_write = IsOpenKnxGroupValueWrite(cemi, cemi_len);
   const bool duplicate_sequence = sequence == client->received_sequence;
   const bool duplicate_payload = duplicate_sequence && client->last_received_cemi == current_cemi;
-  if (duplicate_payload) {
+  if (duplicate_payload && !is_group_value_write) {
     ESP_LOGD(kTag, "duplicate KNXnet/IP tunnelling request channel=%u seq=%u",
              static_cast<unsigned>(channel_id), static_cast<unsigned>(sequence));
     sendTunnellingAck(channel_id, sequence, kKnxNoError, client->data_remote);
@@ -3453,7 +3458,11 @@ void GatewayKnxTpIpRouter::handleTunnellingRequest(const uint8_t* packet_data, s
     }
     return;
   }
-  if (duplicate_sequence) {
+  if (duplicate_payload) {
+    ESP_LOGI(kTag,
+             "reprocessing duplicate KNXnet/IP GroupValueWrite channel=%u seq=%u without cached confirmation replay",
+             static_cast<unsigned>(channel_id), static_cast<unsigned>(sequence));
+  } else if (duplicate_sequence) {
     ESP_LOGW(kTag,
              "accept KNXnet/IP tunnelling request channel=%u with repeated seq=%u because cEMI payload changed",
              static_cast<unsigned>(channel_id), static_cast<unsigned>(sequence));
@@ -4019,8 +4028,13 @@ bool GatewayKnxTpIpRouter::sendCemiFrameToClient(TunnelClient& client, uint16_t
   }
   if (service == kServiceTunnellingRequest && message_code.has_value() &&
       message_code.value() == L_data_con) {
-    client.last_tunnel_confirmation_sequence = send_sequence;
-    client.last_tunnel_confirmation_packet = packet;
+    if (IsOpenKnxGroupValueWrite(data, len)) {
+      client.last_tunnel_confirmation_sequence = 0;
+      client.last_tunnel_confirmation_packet.clear();
+    } else {
+      client.last_tunnel_confirmation_sequence = send_sequence;
+      client.last_tunnel_confirmation_packet = packet;
+    }
   }
   ESP_LOGI(kTag, "sent KNXnet/IP cEMI service=0x%04x channel=%u seq=%u cemi=0x%02x len=%u to %s",
            static_cast<unsigned>(service), static_cast<unsigned>(client.channel_id),