prevent closing bootbox by escape button

Question

I have this function -

function startReview(response_message, prompt, model, reviewable_id, reviewable_type, user_id) {
    bootbox.hideAll();
    if (response_message && response_message.length > 0) {
        response_message = response_message.replace(/\n/g, '<br/>');
        var message = response_message
        message += '...';
        var dialog = bootbox.dialog({
            message: message,
            closeButton: false,
            buttons: {
                thumbs_up: {
                    label: '<i class="fa fa-thumbs-up"></i>',
                    className: 'btn-success',
                    callback: function () {
                        saveUserFeedback(true, prompt, response_message, model, reviewable_id, reviewable_type, user_id);
                        dialog.modal('hide');
                        return false;
                    }
                },
                thumbs_down: {
                    label: '<i class="fa fa-thumbs-down"></i>',
                    className: 'btn-danger',
                    callback: function () {
                        saveUserFeedback(false, prompt, response_message, model, reviewable_id, reviewable_type, user_id);
                        dialog.modal('hide');
                        return false;
                    }
                },
            },
        });
        $('.bootbox .btn-success, .bootbox .btn-danger').parent().css('text-align', 'center');
    } else {
        bootbox.alert("...");
    }
}

The user gets a thumbs up and down buttons that has a callback by pressing one of them. I want the user to be unable to close the bootbox by 'esc' button. I tried these -

$(document).on('keydown.dismiss.bs.modal', function (e) {
    debugger
    if (e.which == 27) {
        e.preventDefault();
    }
});

tried to add this below the dialog declaration -

dialog.init(function () {
    dialog.find('.modal-content').on('keydown.dismiss.bs.modal', function (e) {
        if (e.which == 27) {
            e.stopPropagation();
        }
    });
});

tried to add onEscape: null

none of them worked. if i add a debugger inside the if (e.which == 27) block, the debugger stops and when I allow the code to run it looks like it is preventing the bootbox from closing. Without debugging, it doesn't seem to work. When I run the code on the console, it prevents it from closing the window.

Any ideas why is this happening or what else can I check?