if that can help, here modification of application/helpers# vi SurveyRuntimeHelper.php
line 444 :
//Redbug 9811 suppression de l'interaction de la globalSettings $showqnumcodeglobal
// $showgroupinfoglobal = getGlobalSetting('showgroupinfo');
$aSurveyinfo = getSurveyInfo($this->iSurveyid, App()->getLanguage());

        // Look up if there is a global Setting to hide/show the Questiongroup => In that case Globals will override Local Settings

// if (($aSurveyinfo['showgroupinfo'] == $showgroupinfoglobal) || ($showgroupinfoglobal == 'choose')) {
$showgroupinfo = $aSurveyinfo['showgroupinfo'];
// } else {
// $showgroupinfo = $showgroupinfoglobal;
// }

and line 598

//Redbug 9811 suppression de l'interaction de la globalSettings $showqnumcodeglobal
// $showqnumcodeglobal = getGlobalSetting('showqnumcode');
$showqnumcodesurvey = $this->aSurveyInfo['showqnumcode'];

    // Check global setting to see if survey level setting should be applied

// if ($showqnumcodeglobal == 'choose') {
// Use survey level settings
$showqnumcode_ = $showqnumcodesurvey; //B, N, C, or X
// } else {
// Use global setting
// $showqnumcode_ = $showqnumcodeglobal; //both, number, code, or none
// }

    $aShow = [];

    switch ($showqnumcode_) {
        // Both

// case 'both':
case 'B':
$aShow['question_code'] = true;
$aShow['question_number'] = true;
break;

        // Number only

// case 'number':
case 'N':
$aShow['question_code'] = false;
$aShow['question_number'] = true;
break;

        // Code only

// case 'code':
case 'C':
$aShow['question_code'] = true;
$aShow['question_number'] = false;
break;

        // Neither

// case 'none':
case 'X':
default:
$aShow['question_code'] = false;
$aShow['question_number'] = false;
break;
}

    return $aShow;
}

Best regards
Dan