HarmonyOS clearHistory未生效

demo如下，accessBackward()返回false

import { webview } from '@kit.ArkWeb';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct TestWebPage_2 {
  controller: webview.WebviewController = new webview.WebviewController();

  build() {
    Column() {
      Button('refresh')
        .onClick(() => {
          try {
            this.controller.loadUrl("https://www.huawei.com/");
            console.info('...loadUrl');
          } catch (error) {
            console.error(`ErrorCode: ${(error as BusinessError).code}, Message: ${(error as BusinessError).message}`);
          }
        });

      Web({ src: 'xxx', controller: this.controller })
        .onPageEnd((event)=>{
          if(event?.url === 'https://www.huawei.com/'){
            this.controller.clearHistory();
            console.info('...clearHistory');
          }

          let flag = this.controller.accessBackward();
          console.info('...accessBackward:' + flag);
        })
    }
  }
}
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