Table绑定DataSource后调用setColumnDataFormula最后一行无法设置公式

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在demo地址 https://demo.grapecity.com.cn/sp ... mple/inspector.html
中执行以下代码即可重现。截图中E5未成功绑定公式。

spread.setActiveSheetIndex(3);

const sheet = spread.getActiveSheet();
const table = sheet.tables.all()[0];
table.setColumnDataField(0, 'a');
table.setColumnDataField(1, 'b');
table.setColumnDataField(2, 'c');
table.setColumnDataField(3,'d')
table.bindingPath('t')
const dataSource = new GC.Spread.Sheets.Bindings.CellBindingSource({t:[{a:1,b:1,c:1,d:''},{a:2,b:2,c:2,d:''},{a:3,b:3,c:3,d:''}]});
sheet.setDataSource(dataSource);
table.setColumnDataFormula(3, '=sum([@a],[@b])')