Registry tries to cleanup containers whose removal started already

I'm faced with the following error message and I was wondering why that is.

This is probably a race condition between the --rm option passed to the container upon creation and the docker rm -f the Registry::remove() method calls. Maybe docker tries to automatically remove the container and Registry::remove() requests the same.

Is there a particular reason why the Registry is needed?

Fatal error: Uncaught Symfony\Component\Process\Exception\ProcessFailedException: The command "'docker' 'rm' '-f' 'testcontainer66959b43958a96.16963867'" failed.

Exit Code: 1(General error)

Working directory: /var/www/html

Output:
================


Error Output:
================
Error response from daemon: removal of container testcontainer66959b43958a96.16963867 is already in progress
 in /var/www/html/vendor/symfony/process/Process.php:270
Stack trace:
#0 /var/www/html/vendor/shyim/testcontainer/src/Container/Container.php(230): Symfony\Component\Process\Process->mustRun()
#1 /var/www/html/vendor/shyim/testcontainer/src/Registry.php(36): Testcontainer\Container\Container->remove()
#2 [internal function]: Testcontainer\Registry::cleanup()
#3 {main}
  thrown in /var/www/html/vendor/symfony/process/Process.php on line 270

Start with Registry.php cleanup and Container.php around line 230, then reproduce the reported interaction between the --rm option and docker rm -f. Check the Docker and Symfony Process behavior for a removal already in progress. Done means cleanup no longer produces the reported uncaught failure and its expected behavior is documented or covered by a test.