Cool!, Thx! will give it a try on the snapshot version.
:thumbs_up:

UPDATE: Added some changes to avoid this issue. Changes available on SNAPSHOT version.

https://github.com/mycontroller-org/mycontroller/commit/f557310e831d54cdaa76be62bff62a9ce6788a67

Serial gateway is used, with the mysgw software, radio connected to the gpio header

void presentation() {
  sendSketchInfo("NODE_NAME", "NODE_VERSION");
  present(SEN_ID, S_CUSTOM, "SENSOR_NAME");
}

Can you add some minimal delay between,

send(msg_S_MOTION.set(false),true);
wait(500); // value in milliseconds
send(msg_S_MOTION_ARM.set(s_armed),true);

I guess the problem will be your node sketch presentation code?
This my presentation code

void presentation()  {
	sendSketchInfo(SKETCH_NAME, SKETCH_VERSION,true);
	present(ID_S_MOTION, S_MOTION, "Motion Sensor",true);
	present(ID_TIME_SLEEP, S_CUSTOM, "Time sleep",true);
}

void loop()     
{
	if(first_start){
		first_start = false;
		DEBUG_PRINTLN("Start");
		send(msg_S_MOTION.set(false),true);
		send(msg_S_MOTION_ARM.set(s_armed),true);
		//send(msg_TIME_SLEEP.set(time_sleep));
		//sendRSSIReport();
		//sendBatteryReport(); 
		request(ID_TIME_SLEEP, V_VAR5); //запрос значения time_sleep```

This all sketch

/*******************************************************************
 * DEFINE SECTION
 ********************************************************************/
// Enable debug prints
//#define MY_DEBUG
#define SER_DEBUG
#ifdef SER_DEBUG
#define DEBUG_SERIAL(x) Serial.begin(x)
#define DEBUG_PRINT(x) Serial.print(x)
#define DEBUG_PRINTLN(x) Serial.println(x)
#else
#define DEBUG_SERIAL(x)
#define DEBUG_PRINT(x) 
#define DEBUG_PRINTLN(x) 
#endif
#define ONE_DAY_TIME 86400000 //24 часа
#define ONE_HOUR_TIME 3600000 //1 час

#define MY_SMART_SLEEP_WAIT_DURATION_MS (30000ul) //время прослушки эфира до ухода в сон
#define TIME_SLEEP_INIT 60000
#define RSSI_REPORT_INTERVAL 180000
#define BATTERY_REPORT_INTERVAL 600000
//#define BATTERY_REPORT_INTERVAL ONE_DAY_TIME
//#define MY_INDICATION_HANDLER


 // Enable and select radio type attached
//#define MY_RADIO_NRF24
#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95
//#define MY_RADIO_NRF5_ESB


#ifdef MY_RADIO_NRF24
//#define SKETCH_NAME "nrf24 gate"
#define MY_RF24_PA_LEVEL (RF24_PA_MAX)
#define MY_RF24_CHANNEL (124)
//#define MY_RF24_CHANNEL (125)
#endif
#ifdef MY_RADIO_RFM69
//#define SKETCH_NAME "rfm69 gate"
#define MY_IS_RFM69HW
#define MY_RFM69_NEW_DRIVER   // ATC on RFM69 works only with the new driver (not compatible with old=default driver)
#define MY_RFM69_ATC_MODE_ENABLED
#define MY_RFM69_ATC_TARGET_RSSI_DBM (-70)  // target RSSI -70dBm
#define MY_RFM69_MAX_POWER_LEVEL_DBM (20)   // max. TX power 10dBm = 10mW
//#define MY_DEBUG_VERBOSE_RFM69
//#define MY_RFM69_ENABLE_ENCRYPTION
#endif
//**** Message signing settings

/*#define MY_SIGNING_SOFT
#define MY_SIGNING_SOFT_RANDOMSEED_PIN 7
#define MY_SIGNING_REQUEST_SIGNATURES*/

#ifdef  MY_RADIO_RFM95
//#define SKETCH_NAME "rfm95 gate"
#define MY_RFM95_FREQUENCY RFM95_434MHZ
//#define MY_TRANSPORT_STATE_TIMEOUT_MS  (3*1000ul)
//#define RFM95_RETRY_TIMEOUT_MS  (3000ul) 
//#define MY_RFM95_MODEM_CONFIGRUATION  RFM95_BW125CR48SF4096
#define MY_RFM95_MODEM_CONFIGRUATION RFM95_BW125CR45SF128
#define MY_RFM95_ATC_TARGET_RSSI_DBM (-70)  // target RSSI -70dBm
#define MY_RFM95_MAX_POWER_LEVEL_DBM (30)   // max. TX power 30dBm = 1000mW
#endif

#ifdef MY_RADIO_NRF5_ESB
//#define SKETCH_NAME "nrf5 gate"
#endif


#if defined(MY_RADIO_RFM69) || defined(MY_RADIO_RFM95) 
#define MY_SIGNAL_REPORT_ENABLED
#define MY_DEFAULT_RX_LED_PIN LED_BUILTIN
#endif

// Set baud rate to same as optibot
#define MY_BAUD_RATE 9600

#define MY_NODE_ID 3
#define SKETCH_NAME "Motion Sensor"
#define SKETCH_VERSION "1.0"

#define ID_S_MOTION		1   // Id of the sensor child
#define ID_TIME_SLEEP  	2
#define ID_RSSI		  	3

#define PIN_S_MOTION  	3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define PIN_PWR   		4   // Pin for power sensors in sleep.
#define VCC_MIN 		2.7
#define VCC_MAX 		3.9

#include <MySensors.h>
#include <Vcc.h>
Vcc vcc;

/*
//Отправить уровень батареи после стольких циклов передач.Максимальный интервал отчета также будет равен этому количеству дней.
int BATTERY_REPORT_BY_IRT_CYCLE = 10; 
// "false" will make the first loop disregard high output from HV-505 (from start-up) and make a battery report instead.  
bool interruptReturn = false;
*/


#if defined(MY_RADIO_RFM69) || defined(MY_RADIO_RFM95)
MyMessage msg_RSSI(ID_RSSI,V_VAR5);//Создаем контейнер для измерителя RSSI
#endif
MyMessage msg_S_MOTION(ID_S_MOTION, V_TRIPPED);// Создаем контейнер для датчика
MyMessage msg_S_MOTION_ARM(ID_S_MOTION, V_ARMED);// Создаем контейнер для датчика
MyMessage msg_TIME_SLEEP(ID_TIME_SLEEP, V_VAR5);



bool first_start;
bool s_armed; //режим работы сенсора - armed, bypassed
unsigned long time_sleep;
unsigned long lastSendRSSI = 0;
unsigned long lastSendBattery = 0;
unsigned long millis_in_sleep = 0;
unsigned long millis_total = 0;
int sleep_returt;


void setup()  
{  
	DEBUG_PRINTLN("Setup");
	first_start = true;
	s_armed = true;
	time_sleep = TIME_SLEEP_INIT;
	pinMode(PIN_PWR, OUTPUT);//Пин питающий датчики
	digitalWrite(PIN_PWR, HIGH);
	pinMode(PIN_S_MOTION, INPUT);      // Вход датчика
	//digitalWrite(PIN_S_DOOR, HIGH);  //подтяжка к плюсу для отладки
}

void presentation()  {
	sendSketchInfo(SKETCH_NAME, SKETCH_VERSION,true);
	present(ID_S_MOTION, S_MOTION, "Motion Sensor",true);
	present(ID_TIME_SLEEP, S_CUSTOM, "Time sleep",true);
}

void loop()     
{
	if(first_start){
		first_start = false;
		DEBUG_PRINTLN("Start");
		send(msg_S_MOTION.set(false),true);
		send(msg_S_MOTION_ARM.set(s_armed),true);
		//send(msg_TIME_SLEEP.set(time_sleep));
		//sendRSSIReport();
		//sendBatteryReport(); 
		request(ID_TIME_SLEEP, V_VAR5); //запрос значения time_sleep

	}	
	millis_total = millis() + millis_in_sleep + MY_SMART_SLEEP_WAIT_DURATION_MS;
#if defined(MY_RADIO_RFM69) || defined(MY_RADIO_RFM95)
	if (millis_total - lastSendRSSI > RSSI_REPORT_INTERVAL) {
		lastSendRSSI = millis_total;
		sendRSSIReport();
	}
#endif
	if (millis_total - lastSendBattery > BATTERY_REPORT_INTERVAL) {
		lastSendBattery = millis_total;
		sendBatteryReport(); 
	}

	//sendHeartbeat();
	sleep_returt = sleep(digitalPinToInterrupt(PIN_S_MOTION),CHANGE,time_sleep,true);
	if(sleep_returt != MY_WAKE_UP_BY_TIMER){ // проснулись по тревоге
		send(msg_S_MOTION.set(true),true);
		DEBUG_PRINTLN("ТРЕВОГА!!!");
	}
	else{
		millis_in_sleep = millis_in_sleep + time_sleep;
	}
	DEBUG_PRINT("ts = ");DEBUG_PRINTLN(time_sleep);
}

/*********************FUNCTIONS**********************************/
//функция обработки входящих сообщений
void receive(const MyMessage &message) {
    if (message.sensor == ID_S_MOTION) {		//проверяем, что именно этому сенсору
		if (message.type == V_ARMED) {		//проверяем тип переменной
			s_armed = message.getBool();	//получаем значение V_ARMED
			DEBUG_PRINT("V_ARMED received: ");DEBUG_PRINTLN(s_armed);
			if(s_armed){
				DEBUG_PRINTLN("Power On");
				digitalWrite(PIN_PWR, HIGH); //включаем питание
				//digitalWrite(PIN_PWR, LOW); //для отладки
			}
			else{
				DEBUG_PRINTLN("Power Off");
				digitalWrite(PIN_PWR, LOW); //отключаем питание	
				//digitalWrite(PIN_PWR, HIGH); //для отладки
			}
        }
    }
	else if (message.sensor == ID_TIME_SLEEP){
		if (message.type == V_VAR5) {
			time_sleep = message.getULong(); //получаем значение sleep_time
			DEBUG_PRINT("time_sleep = ");DEBUG_PRINTLN(time_sleep);
		}
	}
}
//функция отправки RSSI если используем RFM69 радио

#if defined(MY_RADIO_RFM69) || defined(MY_RADIO_RFM95)
void sendRSSIReport() 
{
	int16_t rssiVal;
	char rssiStr[14];
    rssiVal = transportGetSignalReport(SR_RX_RSSI); 
//    snprintf(rssiStr,10,"rssi: %d%",rssiVal,"dBm");
	sprintf (rssiStr, "rssi:%d dBm", rssiVal);
    send(msg_RSSI.set(rssiStr),true);
	DEBUG_PRINTLN(rssiStr);
	//DEBUG_PRINT("TxRssi = ");DEBUG_PRINTLN(transportGetSignalReport(SR_TX_RSSI));
}
#endif
//функция отправки отчета состояния батареи
void sendBatteryReport() 
{
  float p = vcc.Read_Perc(VCC_MIN, VCC_MAX, true);
  int batteryPcnt = static_cast<int>(p);
  sendBatteryLevel(batteryPcnt,true);
  DEBUG_PRINT("Battery is: ");DEBUG_PRINTLN(batteryPcnt);
}

I can not find an error yet. I'll look further.

MyController waited until the node came out of sleep and sent it the right message.
Now when I try to change this variable, I get the following warning

Yes, I changed this approach as follows,

If you change anything for a sleeping node, simply it will be sent to the queue. Will not update into inventory/graph etc., Once it sent successfully to the sleeping node, it will be updated.

I will change this message to user friendly, also I will try to display message queue for a sleeping node.

When registering nodes with a sensor of the "Motion" type in the old version of MyController, I created two variables "V_ARMED" and "V_TRIPPED". In the new version, only a variable of the type "V_TRIPPED" is created

I guess the problem will be your node sketch presentation code?

@jkandasa Actually without going in edit you don't have anything telling you if this GW uses ack. Enabled / disabled would be enough for me.

Changes updated in SNAPSHOT build.
changes: https://github.com/mycontroller-org/mycontroller/commit/0e7467e230927b67d8f664476f83e2f509d69010

By the way, I suggest adding something in this page to expose the ack flag status:

You mean ack enabled or disabled? Or something else?

PS: really minor issue: the order of the dashboards is reversed now; is there a way to change it?

There is a change in dashboard, from this fix -> https://github.com/mycontroller-org/mycontroller/issues/424

Do you see anything different? It should be order by ascending alphabetical

I updated the version, and now the issue is fixed.
For the time being everything is running fine, I'll let it run for a pair of days and let you know if I find any issue.

By the way, I suggest adding something in this page to expose the ack flag status: