Problem with Blob encoding in Safari?

Question

safari

There is such an initial version of the code for downloading a text file (text/plain) to the OS (a piece of code is taken out from the angular component\typescript):

...
getTextCompanyInfo(): string {
  let copyText = '';
  
  this.clientInfo.forEach((field: IInfo) => {
    const description = field.description
      ? `${field.description}: `
      : '';
      copyText += `${description}${field.value}\n`;
  });
  return copyText;
}

download(): void {
  StatusTrackerModalComponent.createDownloadLink(
    this.getTextCompanyInfo()
  )
}

static createDownloadLink(
  fileBody: string,
  fileName: string = 'Реквизиты.txt'
  ): void {
    if (window.navigator && window.navigator.msSaveOrOpenBlob) { // если браузер IE11
      window.navigator.msSaveOrOpenBlob(new Blob([fileBody]), fileName);
    } else { // если evergreen браузеры
      const link = window.document.createElement('a');
      link.href = window.URL.createObjectURL(
        new Blob([fileBody], { type: 'text/plain;charset=utf-8' })
      );
      link.download = fileName;
      link.click();
    }
}
...

Then the code was slightly modified to this option (using a plugin for cross-browser compatibility):

import { saveAs } from 'file-saver';
...
getTextCompanyInfo(): string {
  let copyText = '';
  this.clientInfo.forEach((field: IInfo) => {
    const description = field.description
      ? `${field.description}: `
      : '';
    copyText += `${description}${field.value}\n`;
  });
  return copyText;
}

copy(): void {
  const copiedText = this.getTextCompanyInfo();
  copy(copiedText);
}

download(): void {
  const type = 'text/plain;charset=utf-8';
  const copiedText = this.getTextCompanyInfo();
  const blob = new Blob([copiedText], { type });
  saveAs(blob, this.fileName);
}
...

In both cases, the result is the same - in Web or Android (Chrome) - the text file is downloaded in OS - Desktop or Android.
In iOS \ Safari (v.12.4.1) - the file is not downloaded, but opens in such a window ( I can’t even say exactly what kind of window it is, because it’s not an apple tree at all ):



Tell me - how to understand what the problem is in general and how to solve it?