isPressed() returns false when button is pressed down while resetting the board

[microbit-carlos]

Simple program, on startup if Button A is pressed it displays the letter A, otherwise ?:

#include "MicroBit.h"

MicroBit uBit;

int main() {
    uBit.init();

    if (uBit.buttonA.isPressed()) {
        uBit.display.print('A');
    } else {
        uBit.display.print('?');
    }
    while (true) uBit.sleep(1000);
}

MICROBIT.hex.zip

• With the board powered off, keeping button A pressed down and inserting the USB cable shows A ✅
• While powered on, keeping the button A pressed down, and pressing the reset button shows ? ❌

[microbit-carlos]

With this provided codal.json file, the issue is resolved with MICROBIT_BLE_PAIRING_MODE=1, but breaks with MICROBIT_BLE_PAIRING_MODE=0.

{
    "target": {
        "name": "codal-microbit-v2",
        "url": "https://github.com/lancaster-university/codal-microbit-v2",
        "branch": "master",
        "type": "git"
    },
    "config":{
        "DEVICE_BLE": 1,
        "MICROBIT_BLE_ENABLED" : 0,
        "MICROBIT_BLE_PAIRING_MODE": 0
    }
}

[microbit-carlos]

With MICROBIT_BLE_PAIRING_MODE =0, adding uBit.sleep(100) before the uBit.buttonA.isPressed() (which happens in uBit.init() when pairing mode is enabled) seems to resolve the issue. 🤔