From a203a5183be5f00cf58e3112b20787d9fa2d118b Mon Sep 17 00:00:00 2001
From: Chaouki Dhib <chaodhib@gmail.com>
Date: Sat, 8 May 2021 15:22:18 +0200
Subject: [PATCH] fix(Core/Movement): Fix strange teleport when rooting a
 fleeing NPC (#5555)

---
 .../MovementGenerators/PointMovementGenerator.cpp         | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/server/game/Movement/MovementGenerators/PointMovementGenerator.cpp b/src/server/game/Movement/MovementGenerators/PointMovementGenerator.cpp
index 83ab79000..c57fec141 100644
--- a/src/server/game/Movement/MovementGenerators/PointMovementGenerator.cpp
+++ b/src/server/game/Movement/MovementGenerators/PointMovementGenerator.cpp
@@ -17,6 +17,14 @@
 template<class T>
 void PointMovementGenerator<T>::DoInitialize(T* unit)
 {
+    if (unit->HasUnitState(UNIT_STATE_ROOT | UNIT_STATE_STUNNED))
+    {
+        // the next line is to ensure that a new spline is created in DoUpdate() once the unit is no longer rooted/stunned
+        // todo: rename this flag to something more appropriate since it is set to true even without speed change now.
+        i_recalculateSpeed = true;
+        return;
+    }
+
     if (!unit->IsStopped())
         unit->StopMoving();