Exporting Options in SisenseJS

Hello!

Please accept my apologies for the delay. 
Kindly ask you to try using this prepareCSVPayload and check if the issue persists:

const prepareCSVPayload = (widget) => {
    let query = {}
    query.data = widget.$$model.$query.buildWidgetQuery(widget.$$model, 'exportToCSV');
    query.data = Object.assign(query.data, {
        format: "csv",
        isMaskedResponse: true,
        download: true,
        count: 0,
        offset: 0
    });
    query.data = widget.$$model.dashboard.$query.createJaqlRequestConfig(query.data);
    query.data = encodeURIComponent(JSON.stringify(query.data))
    return new URLSearchParams(query).toString()
}

Best regards,
Illia