[Knockback] Fix knockback causing stuck in Ahnqiraj

src/PlayerbotAI.cpp

@@ -1093,7 +1093,9 @@ void PlayerbotAI::HandleBotOutgoingPacket(WorldPacket const& packet)
                 horizontalSpeed = 0.11f;
             }
             verticalSpeed = -verticalSpeed;
-
+            // high vertical may result in stuck as bot can not handle gravity
+            if (verticalSpeed > 35.0f)
+                break;
             // stop casting
             InterruptSpell();