javascript - Angular formatDate() 将我的值设置为以前的值

Question

我有下面的代码块，'deathDate' 得到一个正确的值，但是'dateOfLastWages' 为空并且 formatDate() 将 'this.matterData.dateOfLastWages' 设置为 'this.matterData.deathDate'

this.matterService.getMatterData(this.claim.matter.matterNumber)
  .subscribe((res: any) => {
      this.matterData = res;
      this.matterData.birthDate = formatDate(res.birthDate, 'dd/MM/yyyy', 'en-US');
      this.matterData.deathDate = formatDate(res.deathDate, 'dd/MM/yyyy', 'en-US');
      this.matterData.dateOfLastWages = formatDate(res.dateOfLastWages, 'dd/MM/yyyy', 'en-US');
      this.loading = false;
    }, error => {
      this.alertService.error(error);
    },
    () => {

    }
  );