isinstance is calling ob.__getattribute__ as a fallback instead of object.__class__.__get__

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-01-26.21:10:40.522>
labels = ['interpreter-core', '3.7', 'library']
title = 'isinstance is calling ob.__getattribute__ as a fallback instead of object.__class__.__get__'
updated_at = <Date 2021-12-10.11:41:23.463>
user = 'https://github.com/mr-nfamous'

bugs.python.org fields:

activity = <Date 2021-12-10.11:41:23.463>
actor = 'steven.daprano'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core', 'Library (Lib)']
creation = <Date 2018-01-26.21:10:40.522>
creator = 'bup'
dependencies = []
files = []
hgrepos = []
issue_num = 32683
keywords = []
message_count = 16.0
messages = ['310793', '310814', '310823', '408122', '408128', '408131', '408133', '408135', '408136', '408141', '408165', '408170', '408171', '408172', '408188', '408192']
nosy_count = 7.0
nosy_names = ['rhettinger', 'paul.moore', 'steven.daprano', 'r.david.murray', 'ethan.furman', 'bup', 'Gabriele Tornetta']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue32683'
versions = ['Python 3.7']