Tarfile recursively opens in windows, but not in Linux [Python]

Question

I have a Python program which extracts a zip file. The zip file looks like this:

a.zip
  |
  |
  --- b.tar.gz
  .     |
  .     |
  .     --- c.tar

Here is my code:

with zipfile.ZipFile("a.zip", 'r') as zipRef:
    with zipRef.open("b.tar.gz") as x:
        x_filedata = io.BytesIO(x.read())
        with tarfile.open(fileobj=x_filedata) as tarRef:
            tarFiles = tarRef.getmembers()
            for fileInTar in tarFiles:
                print(fileInTar)

In Windows, this code recursively opens c.tar too and prints the contents of c.tar file. But in Centos, it prints c.tar. Why is this happening?