READABLE from COPY does not recieve close event

I am using a postgres client to run COPY on the server to stdout into a readable stream. I am using pipeline and noticing that sometimes pipeline hangs indefinetly due to the readabel stream never getting the 'close' event. I provided sample code below. I'm trying to read the output of copy to a local file.

await pipeline(
          await sourceSql`COPY (${sourceSql.unsafe(
      'select * from test where id = ' +
        id
    )}) to stdout WITH (FORMAT CSV, NULL "NULL", HEADER)`.readable();,
          createWriteStream(
            `${os.homedir()}/cms/${testName}`
          )
        );
      }

Use the reported PostgreSQL COPY-to-stdout call and its .readable() entry point with the pipeline and createWriteStream example; first reproduce whether the readable stream emits close. Done means the pipeline completes and the COPY output is written to the local file without hanging.