BLE disconnect during code "pause"

Question

I have a code that should pause the script for a specific time (x_time). if x_time is above 30-40 sec the BLE connection to the android phone is lost. Any suggestions on how to avoid the lost connection and creating a pause in the script?

code:

#include "LSM6DS3.h"
#include "Wire.h"
#include <ArduinoBLE.h> // Arduino BLE library
//Create a instance of class LSM6DS3
LSM6DS3 myIMU(I2C_MODE, 0x6A); //I2C device address 0x6A
const char* UUID_serv = "75681d64-fd7e-40f7-874f-c6f2e7ec996c";
// UUids for accelerometer characteristics
const char* UUID_AccBLE = "75681d64-dd7e-40f7-874f-c6f2e7ec996c";
BLEService myService(UUID_serv);
BLEIntCharacteristic AccBLE(UUID_AccBLE, BLERead | BLENotify);
void setup() {
 // put your setup code here, to run once:
 Serial.begin(9600);
 while (!Serial) {
 pinMode(LEDB, OUTPUT); // onboard led blue
 //Call .begin() to configure the IMUs
 if (myIMU.begin() != 0) {
 Serial.println("Device error");
 } else {
 Serial.println("Device OK!");
 }
 // init BLE
 if (!BLE.begin()) {
 Serial.println("BLE: failed");
 }
 Serial.println("BLE: ok");
 BLE.setAdvertisedService(myService);
 myService.addCharacteristic(AccBLE);
 BLE.addService(myService);
 AccBLE.writeValue(0);
 // start advertising
 BLE.advertise();
 Serial.println("Advertising started");
 Serial.println("Bluetooth device active, waiting for connections...");
 }
}
float accelerometerX;
unsigned long BreakPreviousMillis;
unsigned long timestamp = micros();
int x_time = 50000;
void loop() {
 BLEDevice central = BLE.central();
 if (central) {
 Serial.print("Connected to central: ");
 while (central.connected()) {
 accelerometerX = myIMU.readFloatAccelX();
 if (accelerometerX > 2) {
 BreakPreviousMillis = millis();
 while (millis() < BreakPreviousMillis + x_time) {
 Serial.println("pause");
 }
 }
 AccBLE.writeValue(accelerometerX);
 Serial.print("*************LOOP TIME[uS] = ");
 Serial.println(micros() - timestamp); // 13HZ =79000-80000 uS // used to check framerate
 }
 digitalWrite(LEDB, HIGH); // High == turning off the Led
 Serial.print("Disconnected from central: ");
 Serial.println(central.address());
 }
} 

• KIIV: Which core? There are two of them, one has RTOS and second mbed-os (like Arduino 33 nano ble), there might be some differences. Or it needs calling some method to handle events. For example BLE.poll(); or something
• Masilila: Thanks for the comment. I use the mbed-os core
• KIIV: One more thought - add some delay in that while loop, maybe the BLE service is running on lower priority thread and it's "starving" for resources
• Juraj: you can just use delay(x_time); instead of the while loop
• Masilila: Thanks for the response. I tried the delay(x_time) however it was even worse and disconnected af 10-15 sec.