Why does expo-file-system boot stop?

Question

React Native

Here is the code, it works fine for a small number of files:

for (const filename of this.state.iconFiles) {
      const apiUrl = Config.siteURL;
      const result = await FileSystem.downloadAsync(
        `${apiUrl}/${filename}`,
        `${FileSystem.documentDirectory}${filename}`
      );
}

But when I need to download and save 374 files, it freezes all the time.
Downloads about 290 or 301 files, stops and hangs.

Restarted, cleaned, rebooted. Nothing helps. Approximately around the 300th file, everything stops.