Finalize() not working for multiple files in zip

  var archive = archiver('zip');
      archive.on('error', (err) => {
        console.log(err);
        throw err
      })
 for (const report of generatedReports) {
     //report is excel work book object
      const buffer = await report.writeToBuffer()
      archive.append(buffer, {
        name: name
      })
}
console.log("before finalize")
await archive.finalize()
console.log("after finalize")

I am appending multiple excel buffers to the archive, if the number of files I am appending is small ~ 15, it will finalize. But if I append ~20 files, it reaches “before finalize” but never reaches “after finalize”

I am not sure what I am doing wrong, I have tried with zip options {store: true}, it’s able to zip more files but still silently fails.

Help!