__instancecheck__ being checked on type(cls) instead of cls

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-11-12.05:01:11.036>
labels = ['interpreter-core', '3.9', '3.10', '3.11']
title = '__instancecheck__ being checked on type(cls) instead of cls'
updated_at = <Date 2021-11-13.15:44:36.246>
user = 'https://github.com/rhettinger'

bugs.python.org fields:

activity = <Date 2021-11-13.15:44:36.246>
actor = 'brandtbucher'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-11-12.05:01:11.036>
creator = 'rhettinger'
dependencies = []
files = []
hgrepos = []
issue_num = 45791
keywords = ['patch']
message_count = 11.0
messages = ['406187', '406191', '406193', '406219', '406222', '406226', '406227', '406229', '406230', '406237', '406245']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'rhettinger', 'benjamin.peterson', 'serhiy.storchaka', 'brandtbucher']
pr_nums = ['29540']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue45791'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']