site create not working in a loop in 5.9

[CactusWren2020]

Describe the current, buggy behavior

I am running wp site create in a loop in an .sh file. It is now not making the site, but still reporting Success.

Describe how other contributors can replicate this bug

• Wordpress multisite in 5.9
• use the below script in Windows
• observe the below report in log.out
• check the database and see the sites are showing up in wp_blogs but not getting their own tables
• clicking on the sites after the first one created goes back to the main site

script to make sites

# saves log to log.out
exec 1>log.out 2>&1

for i in {6..10}
do
    # creates subsites in a multisite
    wp site create --slug=new_site_$i --title=new_site_$i --email=mike@mike.com
done

output in log.out

C:\xampp\htdocs\network_sub>type log.out
Success: Site 6 created: http://www.network_sub.loc/sub6/
Success: Site 7 created: /
Success: Site 8 created: /
Success: Site 9 created: /
Success: Site 10 created: /

Describe what you expect as the correct outcome

My expectations were for the attached script to result in new subsites.

Let us know what environment you are running this on

Windows, xampp

Provide additional context/screenshots

Note that this is working on Wordpress 5.8 and the bug only showed up in 5.9

wp cli info output
C:\xampp\htdocs\network_sub2>wp cli info
OS: Windows NT 10.0 build 19044 (Windows 10) AMD64
Shell: C:\WINDOWS\system32\cmd.exe
PHP binary: C:\xampp\php\php.exe
PHP version: 8.0.3
php.ini used: C:\xampp\php\php.ini
MySQL binary:
MySQL version:
SQL modes:
WP-CLI root dir: phar://wp-cli.phar/vendor/wp-cli/wp-cli
WP-CLI vendor dir: phar://wp-cli.phar/vendor
WP_CLI phar path: C:\xampp\htdocs\network_sub2
WP-CLI packages dir: C:\Users\micha/.wp-cli/packages/
WP-CLI global config:
WP-CLI project config:
WP-CLI version: 2.5.0

[danielbachhuber]

Thanks for the report, @CactusWren2020 !

Were you able to figure this one out?