The variable __module__ in the class body getting an undesirable value from __prepare__ of the metaclass

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-03-27.11:17:56.075>
labels = ['interpreter-core', 'type-bug', '3.9']
title = 'The variable __module__ in the class body getting an undesirable value from __prepare__ of the metaclass'
updated_at = <Date 2022-04-07.11:50:41.756>
user = 'https://bugs.python.org/TakuoMatsuoka'

bugs.python.org fields:

activity = <Date 2022-04-07.11:50:41.756>
actor = 'steven.daprano'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2022-03-27.11:17:56.075>
creator = 'Takuo Matsuoka'
dependencies = []
files = []
hgrepos = []
issue_num = 47136
keywords = []
message_count = 10.0
messages = ['416118', '416136', '416143', '416743', '416745', '416746', '416769', '416789', '416914', '416924']
nosy_count = 3.0
nosy_names = ['steven.daprano', 'ethan.furman', 'Takuo Matsuoka']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue47136'
versions = ['Python 3.9']