wpsjs加载项文档插入图表workbook为null，获取不到

wps加载项插入图表，只有第一个图表可以获取到 workbook对象，后面的workbook都是null

const doc = window.Application.ActiveDocument;

const newParagraph = doc.Paragraphs.Add()

const chart = newParagraph.Range.InlineShapes.AddChart(51).Chart;

console.log("🚀 ~ chart:", chart.ChartData.Workbook)