Transition from All to Custom in Issue create form will reset temporary attachments

    /**
     * Go back to the server and retrieve all the available fields
     */
    refresh: function (values) {

        var instance = this,
            deferred = jQuery.Deferred(),
            data;

        if (values) {
            data = values + "&retainValues=true";
        }

       if (!multipleMode && !hasAnyErrors() && !toggle)
        {
            final TemporaryAttachmentsMonitor temporaryAttachmentsMonitor = temporaryAttachmentsMonitorLocator.get(true);
            temporaryAttachmentsMonitor.clearEntriesForFormToken(getFormToken());
        }