glob is not reporting paths when a folder doesn't contain objects

Given the following S3 bucket structure:

root_bucket/
       something/
           target/
               another_folder/
                   object.txt
       target/
           object.txt
           another_folder/

Given the glob pattern s3://root_bucket/**/target, I expect to obtain s3://root_bucket/something/target and s3://root_bucket/target. However, only s3://root_bucket/target is returned.

This happens in AWS S3, and it is easily reproducible with moto3:

from typing import Generator, NamedTuple

import pytest
import s3fs


class Fixture(NamedTuple):
    base_url: str
    mock_s3_client: s3fs.S3FileSystem


@pytest.fixture(scope="function")
def build(mock_s3_client: s3fs.S3FileSystem) -> Generator[Fixture, None, None]:
    # setup
    base_url = "s3://mock-bucket/fake-project"
    mock_s3_client.mkdir(base_url)

    # First subfolder, with no objects after target.
    mock_s3_client.mkdir(f"{base_url}/something")
    mock_s3_client.mkdir(f"{base_url}/something/target")
    mock_s3_client.mkdir(f"{base_url}/something/target/folder1")
    mock_s3_client.touch(f"{base_url}/something/target/folder1/file.xml")
    mock_s3_client.mkdir(f"{base_url}/something/target/folder2")
    mock_s3_client.touch(f"{base_url}/something/target/folder2/file.xml")

    # Second subfolder, with objects after target.
    mock_s3_client.mkdir(f"{base_url}/target")
    mock_s3_client.touch(f"{base_url}/target/example.txt")
    mock_s3_client.mkdir(f"{base_url}/target/folder3")
    mock_s3_client.touch(f"{base_url}/target/folder3/file.xml")
    mock_s3_client.mkdir(f"{base_url}/target/folder4")
    mock_s3_client.touch(f"{base_url}/target/folder4/file.xml")

    # verify folder structure
    assert set(mock_s3_client.ls(base_url)) == {
        "mock-bucket/fake-project/something",
        "mock-bucket/fake-project/target",
    }

    # run
    yield Fixture(
        base_url=base_url,
        mock_s3_client=mock_s3_client,
    )


def test_find_subfolders(build: Fixture) -> None:
    glob_pattern = f"{build.base_url}/**/target"
    result = build.mock_s3_client.glob(glob_pattern)

    assert len(result) == 2
    assert set(result) == {
        "s3://mock-bucket/fake-project/something/target",
        "s3://mock-bucket/fake-project/target",
    }

Start with the supplied test_find_subfolders reproduction and the S3FileSystem.glob entry point. Run the test against the shown bucket structure, then trace glob's handling of directories without direct objects. Done means both target paths are returned and the regression test passes.