Broken Pipe in Server of Manager in multiprocessing when finalizing, sometimes

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-07-12.22:07:45.419>
labels = ['type-bug', 'library', '3.9']
title = 'Broken Pipe in Server of Manager in multiprocessing when finalizing, sometimes'
updated_at = <Date 2021-07-13.13:25:37.945>
user = 'https://github.com/mutax'

bugs.python.org fields:

activity = <Date 2021-07-13.13:25:37.945>
actor = 'Mark.Shannon'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-07-12.22:07:45.419>
creator = 'mutax'
dependencies = []
files = ['50145']
hgrepos = []
issue_num = 44614
keywords = ['patch']
message_count = 1.0
messages = ['397358']
nosy_count = 2.0
nosy_names = ['Mark.Shannon', 'mutax']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44614'
versions = ['Python 3.9']