Trigger Python import "module not found" when importing submodule from linked package on Wine 7.22 staging

wineissue.sh

#!/bin/bash

# 3.7.9 triggers the bug, 3.10.9 does not
MAJOR=3
MINOR=7
MAINTANANCE=9

PYTHONARCH=amd64  # options: win32, amd64
export WINEARCH=win64  # options: win32, win64

export WINEPREFIX=$PWD/localprefix  # dedicated wine prefix for test
export WINEDLLOVERRIDES="mscoree=d"  # avoid mono
export WINEDEBUG=-all  # change debug level here
export VIRTUAL_ENV=""  # in case this runs in a virtual environment

VERSION=$MAJOR.$MINOR.$MAINTANANCE
if [ ! -f python-$VERSION-embed-$PYTHONARCH.zip ]
then
    wget https://www.python.org/ftp/python/$VERSION/python-$VERSION-embed-$PYTHONARCH.zip &> /dev/null
fi
if [ -d install ]
then
    rm -r install  # remove old install
fi
unzip python-$VERSION-embed-$PYTHONARCH.zip -d install > /dev/null

STDLIB=$MAJOR$MINOR
unzip install/python$STDLIB.zip -d install/Lib > /dev/null  # unpack stdlib
rm install/python$STDLIB.zip  # remove packed stdlib
printf "Lib\n.\n\n# Uncomment to run site.main() automatically\nimport site\n" > install/python$STDLIB._pth  # point to unpacked stdlib

if [ -d $WINEPREFIX ]
then
    rm -r $WINEPREFIX  # remove old prefix
fi
wine install/python.exe -m platform  # create and check the prefix

if [ -d temp ]
then
    rm -r temp  # remove temp module folder
fi
for NAME in foo bar  # create two python modules with submodules and relative imports
do
    mkdir -p temp/$NAME/sub$NAME
    printf "from .sub$NAME import func$NAME" > temp/$NAME/__init__.py
    printf "from .mod$NAME import func$NAME" > temp/$NAME/sub$NAME/__init__.py
    printf "def func$NAME():\n    print('mod$NAME running')\n" > temp/$NAME/sub$NAME/mod$NAME.py
done

mv temp/foo install/Lib/site-packages/  # move module "foo" to site-packages
ln -s $PWD/temp/bar install/Lib/site-packages/bar  # link module "bar" to site-packages

wine install/python.exe -c "from foo import funcfoo; funcfoo()"  # works
wine install/python.exe -c "from bar import funcbar; funcbar()"  # triggers the bug