diff --git a/core/deps/ggpo/lib/ggpo/network/udp_proto.cpp b/core/deps/ggpo/lib/ggpo/network/udp_proto.cpp
index 441f7540ec..738e183e18 100644
--- a/core/deps/ggpo/lib/ggpo/network/udp_proto.cpp
+++ b/core/deps/ggpo/lib/ggpo/network/udp_proto.cpp
@@ -62,6 +62,7 @@ UdpProtocol::UdpProtocol() :
    _oo_packet.msg = NULL;
 
    _send_latency = GGPOPlatform::GetConfigInt("GGPO_NETWORK_DELAY");
+   _jam_latency = GGPOPlatform::GetConfigInt("GGPO_NETWORK_JAM_DELAY");
    _oop_percent = GGPOPlatform::GetConfigInt("GGPO_OOP_PERCENT");
 }
 
@@ -822,6 +823,21 @@ UdpProtocol::PumpSendQueue()
             break;
          }
       }
+
+      // simulate temporary packet jam
+      if (_jam_latency) {
+          if (!_enable_jam && (rand() % 600 == 0)) {
+              _enable_jam = true;
+              LogInfo("Jam!");
+          }
+		  if (_enable_jam) {
+			 if ((int)GGPOPlatform::GetCurrentTimeMS() < entry.queue_time + _jam_latency) {
+				break;
+			 }
+             _enable_jam = false;
+		  }
+      }
+
       if (_oop_percent && !_oo_packet.msg && ((rand() % 100) < _oop_percent)) {
          int delay = rand() % (_send_latency * 10 + 1000);
          Log("udpproto%d | creating rogue oop (seq: %d  delay: %d)", _queue, entry.msg->hdr.sequence_number, delay);
diff --git a/core/deps/ggpo/lib/ggpo/network/udp_proto.h b/core/deps/ggpo/lib/ggpo/network/udp_proto.h
index c6b8a4c63c..8198f0d030 100644
--- a/core/deps/ggpo/lib/ggpo/network/udp_proto.h
+++ b/core/deps/ggpo/lib/ggpo/network/udp_proto.h
@@ -151,6 +151,8 @@ class UdpProtocol : public IPollSink
    uint16         _remote_magic_number;
    bool           _connected;
    int            _send_latency;
+   int            _jam_latency;
+   bool           _enable_jam;
    int            _oop_percent;
    struct {
       int         send_time;
diff --git a/core/gdxsv/gdxsv.cpp b/core/gdxsv/gdxsv.cpp
index a045bd5439..47b2c1cc44 100644
--- a/core/gdxsv/gdxsv.cpp
+++ b/core/gdxsv/gdxsv.cpp
@@ -6,7 +6,6 @@
 #include <random>
 #include <sstream>
 
-#include "cfg/cfg.h"
 #include "cfg/option.h"
 #include "emulator.h"
 #include "gdx_rpc.h"
@@ -117,6 +116,10 @@ void Gdxsv::Reset() {
 		config::GdxLocalPort = get_random_port_number();
 	}
 
+	if (config::GdxLoginKey.get().empty()) {
+		config::GdxLoginKey = GenerateLoginKey();
+	}
+
 	NOTICE_LOG(COMMON, "gdxsv disk:%d server:%s loginkey:%s udp_port:%d", (int)disk_, config::GdxLobbyServer.get().c_str(),
 			   config::GdxLoginKey.get().c_str(), config::GdxLocalPort.get());
 
diff --git a/run.py b/run.py
index e9c7146900..25b252e64d 100644
--- a/run.py
+++ b/run.py
@@ -100,7 +100,9 @@ def run(idx, *arg_list) -> subprocess.Popen:
     print(cmd)
     new_env = os.environ.copy()
     new_env["GGPO_NETWORK_DELAY"] = "16"
-    new_env["GGPO_OOP_PERCENT"] = "1"
+    # new_env["GGPO_OOP_PERCENT"] = "1"
+    if idx == 0:
+        new_env["GGPO_NETWORK_JAM_DELAY"] = "500"
     # else: new_env["GGPO_NETWORK_DELAY"] = "100"
     return subprocess.Popen(cmd, shell=True, env=new_env)