ESP32 DevKitC v4 not scanning **some** BLE Signals (but ESP32 DevKitC V2 does) - bluetooth-lowenergy

Question

For a work-related project, I developed a program using the ESP32 DevKitC V2 to scan for smart-beacons with specific MAC-Addresses. Everything was working fine until I decided to buy some DevKit V4. On the DevKit V4, it still scans some BLE Advertising signals but somehow not anymore the ones from the smart-beacons I need to track. The smart-beacons are the Smart Beacon Go Mini from blukii. The smart-beacons only act as BLE advertisers and advertise every second. I'm not trying to connect to them.
My questions are:
Do the DevKit V4 have different BLE capabilities than the V2? (couldn't find anything googling)
Any idea to solve this problem?
I develop using Platformio on VSCode.
platform.ini:
[env:esp32dev]
framework = arduino
platform = espressif32
board = az-delivery-devkit-v4
board_build.partitions = huge_app.csv
monitor_speed = 115200
lib_deps =
h2zero/NimBLE-Arduino#^1.4.0
main.cpp:
#include <Arduino.h>
#include "NimBLEDevice.h"
const int NUMBER_SCAN = 40; // number of scans to perform
const int SCAN_DURATION = 1.1; // duration of a scan in seconds
NimBLEScan *pBLEScan;
void collectAdvertisingPackets()
{
// scan NUMBER_SCAN times
for (int i = 0; i < NUMBER_SCAN; i++)
{
NimBLEScanResults result = pBLEScan->start(SCAN_DURATION);
// number of advertising devices found
int count = result.getCount();
Serial.printf("Total devices found: %d\n", count);
// for each device found
for (int j = 0; j < count; j++)
{
NimBLEAdvertisedDevice device = result.getDevice(j);
std::string macAddress = device.getAddress().toString();
Serial.println(macAddress.c_str());
}
pBLEScan->clearResults(); // delete results from BLEScan buffer to release memory
}
}
void setup()
{
// baudrate for serial communication
Serial.begin(115200);
// BLE scan
NimBLEDevice::init(""); // initialize the ESP32 microcontroller as a BLE device
pBLEScan = NimBLEDevice::getScan();
}
void loop()
{
collectAdvertisingPackets();
}
Any advice is greatly appreciated :)
What did I try: Wrote the code with another library (Neil Kolban BLE library), googling to find if this problem exists. BLE Advertising Signals from the blukii smart beacons are scanned by the ESP32 DevKitC V2 but not by the V4.
What I expected: BLE Advertising Signals from the Blukii Smart Beacons Go Mini to be scanned by the ESP32 DevKitC V4 (which works with the ESP32 DevKitC V2).