diff --git a/game/reconstructed/mech2.cpp b/game/reconstructed/mech2.cpp
index ea85219..152643b 100644
--- a/game/reconstructed/mech2.cpp
+++ b/game/reconstructed/mech2.cpp
@@ -693,8 +693,17 @@ Scalar
 			distance = 0.0f;
 			break;
 		}
-		if (mppr == 0
-			|| (mppr->turnDemand <= 0.05f && mppr->turnDemand >= -0.05f))
+		// MASTER ONLY (regression fix): the master-perf turn-stop exit is master-perf
+		// logic (FUN_004a9b5c runs on MasterInstance mechs, NOT replicants).  A replicant
+		// derives turnDemand from the REPLICATED yaw rate (mech4.cpp:1968) -- a noisy
+		// proxy that dips into the deadband between dead-reckon updates; running this
+		// exit on it kicked the peer out of trn every few frames -> the peer "rotated as
+		// a statue" + jerky (user-reported).  Gate to masters; a replicant leaves trn via
+		// the speed exits + its own turnDemand-driven re-entry, exactly as it did before
+		// this exit was added.
+		if (GetInstance() != ReplicantInstance
+			&& (mppr == 0
+				|| (mppr->turnDemand <= 0.05f && mppr->turnDemand >= -0.05f)))
 		{
 			legStateAlarm.SetLevel(0);					// turn stopped -> Standing (master-perf exit)
 			ForceUpdate(8);
@@ -932,8 +941,9 @@ Scalar
 				distance = 0.0f;
 				break;
 			}
-			if (bm == 0
-				|| (bm->turnDemand <= 0.05f && bm->turnDemand >= -0.05f))
+			if (GetInstance() != ReplicantInstance		// MASTER only (see leg twin)
+				&& (bm == 0
+					|| (bm->turnDemand <= 0.05f && bm->turnDemand >= -0.05f)))
 			{
 				bodyStateAlarm.SetLevel(0);				// turn stopped (leg-symmetric)
 				ForceUpdate(8);
diff --git a/game/reconstructed/mech4.cpp b/game/reconstructed/mech4.cpp
index 3d5cdf8..354598a 100644
--- a/game/reconstructed/mech4.cpp
+++ b/game/reconstructed/mech4.cpp
@@ -1988,6 +1988,19 @@ void
 					legCycleSpeed = 0.0f;
 				(void)AdvanceLegAnimation(dt);		// joints only; travel = DeadReckon
 
+				if (getenv("BT_REPL_TRN"))
+				{
+					static float s_rt = 0.0f; s_rt += dt;
+					if (s_rt >= 0.15f)
+					{
+						s_rt = 0.0f;
+						DEBUG_STREAM << "[repltrn] yawRate=" << yawRate
+							<< " turnDemand=" << replMppr->turnDemand
+							<< " legState=" << (int)legStateAlarm.GetLevel()
+							<< " spd=" << replMppr->speedDemand << "\n" << std::flush;
+					}
+				}
+
 				// REPLICANT BEAMS (task #51): the emitters carry live replicated
 				// discharge state (Emitter::ReadUpdateRecord); draw them with the
 				// same per-weapon walk the master uses.