报command blocking

for遍历文档的ContentControls console.log('第', i, '个内容控件1'); const app = leftInstance.Application; console.log('第', i, '个内容控件2');
console.log('第', i, '个内容控件3');
const contentControl = await contentControls.Item(i + 1);
console.log('第', i, '个内容控件4', contentControl);
有概率在有一次的3~4步之间报错，如下：
app-ready-common.5ef94b9e.chunk.zh-CN.js:1 Uncaught Error: command blocking!
at e.value (app-ready-common.5ef94b9e.chunk.zh-CN.js:1:748910)
at e.value (app-ready-common.5ef94b9e.chunk.zh-CN.js:1:749598)
at t.value (doc_application_pc.ec9d5c76.chunk.zh-CN.js:1:97184)
at t.value (doc_application_pc.ec9d5c76.chunk.zh-CN.js:1:97564)
at e.value (doc_application_pc.ec9d5c76.chunk.zh-CN.js:1:615567)
at e.value (doc_application_pc.ec9d5c76.chunk.zh-CN.js:1:614941)
at callback (doc_application_pc.ec9d5c76.chunk.zh-CN.js:1:615201)
at e.execTask (doc_application_base.ceca1151.chunk.zh-CN.js:1:47203)
at e.workLoop (doc_application_base.ceca1151.chunk.zh-CN.js:1:47615)
at e.flushWork (doc_application_base.ceca1151.chunk.zh-CN.js:1:47030)