Python files_list_folder.sharing_info shows None

Until two weeks ago, running the below code would return a hash for sharing_info of each entry. But now it's returning none. Can anyone tell me whats going on?

Using python documention found here: 

http://dropbox-sdk-python.readthedocs.io/en/latest/moduledoc.html#module-dropbox.files

files_list_folder(path, recursive=False, include_media_info=False, include_deleted=False, include_has_explicit_shared_members=False)

My code:

entries = dbx.files_list_folder('myfolder',recursive=True)

Sample of 2 entry results:

FileMetadata(name=u'brei3389_2016_8879-signed.pdf', id=u'id:2SS_0foZgqYAAAAAAAodvw', client_modified=datetime.datetime(2017, 2, 28, 3, 16, 31), server_modified=datetime.datetime(2017, 5, 8, 18, 24, 33), rev=u'27ade301577694', size=224825, path_lower=u'/brian alan lang ea/work papers/bravo/breit/2016/brei3389_2016_8879-signed.pdf', path_display=u'/brian alan lang ea/work papers/bravo/breit/2016/brei3389_2016_8879-signed.pdf', parent_shared_folder_id=None, media_info=None, sharing_info=None, property_groups=None, has_explicit_shared_members=None, content_hash=u'6025e1a0e7ed65ddab7cc395fdd3e42132ae5e11584f027cb46eb3af967c44e7'), FileMetadata(name=u'Brei3389_2016_Lyft.png', id=u'id:2SS_0foZgqYAAAAAAAodvg', client_modified=datetime.datetime(2017, 2, 24, 12, 12, 45), server_modified=datetime.datetime(2017, 5, 8, 18, 24, 33), rev=u'27ade401577694', size=111115, path_lower=u'/brian alan lang ea/work papers/bravo/breit/2016/brei3389_2016_lyft.png', path_display=u'/brian alan lang ea/work papers/bravo/breit/2016/Brei3389_2016_Lyft.png', parent_shared_folder_id=None, media_info=None, sharing_info=None, property_groups=None, has_explicit_shared_members=None, content_hash=u'30d161a17054b38e9b74dc2a7f43b5f6a1f1180a7aeb2079129b5945c3f7f361'), 

As you can see it shows sharing_info=None where it used to return:

"sharing_info": {
        "read_only": true,
        "parent_shared_folder_id": "84528192421",
        "modified_by": "dbid:AAH4f99T0taONIb-OurWxbNQ6ywGRopQngc"
    },