Several cookies with the same name get intermixed

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-02-03.10:03:48.875>
labels = ['extension-modules', 'type-bug', '3.8']
title = 'Several cookies with the same name get intermixed'
updated_at = <Date 2018-02-13.21:08:35.716>
user = None

bugs.python.org fields:

activity = <Date 2018-02-13.21:08:35.716>
actor = 'terry.reedy'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Extension Modules']
creation = <Date 2018-02-03.10:03:48.875>
creator = '\xd0\xae\xd1\x80\xd0\xb8\xd0\xb9 \xd0\x9f\xd1\x83\xd1\x85\xd0\xb0\xd0\xbb\xd1\x8c\xd1\x81\xd0\xba\xd0\xb8\xd0\xb9'
dependencies = []
files = []
hgrepos = []
issue_num = 32755
keywords = []
message_count = 5.0
messages = ['311544', '311914', '311959', '312122', '312139']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'r.david.murray', 'nitishch', '\xd0\xae\xd1\x80\xd0\xb8\xd0\xb9 \xd0\x9f\xd1\x83\xd1\x85\xd0\xb0\xd0\xbb\xd1\x8c\xd1\x81\xd0\xba\xd0\xb8\xd0\xb9']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue32755'
versions = ['Python 3.8']