venv python reports wrong sys.executable in a subprocess on Windows

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-11-24.08:17:40.212>
labels = ['3.10', 'OS-windows']
title = 'venv python reports wrong sys.executable in a subprocess on Windows'
updated_at = <Date 2021-03-29.22:53:56.136>
user = 'https://github.com/uranusjr'

bugs.python.org fields:

activity = <Date 2021-03-29.22:53:56.136>
actor = 'steve.dower'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2019-11-24.08:17:40.212>
creator = 'uranusjr'
dependencies = []
files = []
hgrepos = []
issue_num = 38905
keywords = []
message_count = 30.0
messages = ['357392', '357393', '357394', '357421', '357425', '357428', '357429', '357430', '357437', '357439', '357440', '357453', '357456', '357457', '357459', '357460', '357479', '357519', '366755', '366824', '370656', '371357', '378284', '385923', '389321', '389345', '389741', '389760', '389761', '389768']
nosy_count = 12.0
nosy_names = ['paul.moore', 'eric.smith', 'tim.golden', 'Jurko.Gospodneti\xc4\x87', 'zach.ware', 'eryksun', 'steve.dower', 'uranusjr', 'Benedek R\xc3\xa1cz', 'nsmcan', 'nirvana-msu', 'awaizman']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue38905'
versions = ['Python 3.10']