Can't remove QML AudibleReminder Element from QML OrganizerItem Element

function removeReminder(item)
{
    for (var j = 0; j < item.details.length; j++) {
        var existingDetail = item.details[j]
        if (existingDetail.type == Detail.AudibleReminder) {
            var bug = true
            if (bug) {
                var s = item.removeDetail(existingDetail)
                item.save()
                console.log("!!!!!!! S " + s) // true but audiblereminder is still there (item.details.length is same than before)
            } else {
                item.clearDetails()
            }
            return
        }
    }
}