os.execvp on windows doesn't wait for the executed program to finish and doesn't report it's exit code

Bug report

os.execvp on windows doesn't wait for the executed program to finish and doesn't report it's exit code. Code:

import os
import sys

if len(sys.argv) > 1 and sys.argv[1] == "my_argument":
    sys.stderr.write("my_argument detected. Exiting with code 1.\n")
    sys.exit(1)
else:
    sys.stderr.write("no argument detected. Calling os.execvp\n")
    os.execvp(sys.executable, [sys.executable] + sys.argv + ["my_argument"])

bat file:

@echo off
python exec.py
if %errorlevel% NEQ 0 (
    echo The script gave exit code %errorlevel%
) else (
    echo Error: The script exited with exit code 0
)

Output from command prompt:

C:\pythonizer\play>exec.bat
no argument detected. Calling os.execvp
Error: The script exited with exit code 0

C:\pythonizer\play>my_argument detected. Exiting with code 1.

Note the command prompt prompted me for a new command before the exec'd process wrote out it's message.

Your environment

• CPython versions tested on: 3.10.6
• Operating system and architecture: Windows 10

Start by reproducing the Windows 10 behavior with the provided Python script and batch file, then trace the os.execvp entry point and its Windows implementation. Done means the executed program finishes before the batch file continues and its nonzero exit code is reported to the caller.