Unable to add content to a content type named 'type'

As mentioned by @johnwebdev 🐛 Unable to add content to a content type named 'type' Active above, the issue was a name collision.

Added a check to make sure the code operates with the expected instance.

  /** @var \Drupal\node\NodeTypeInterface $type */
  $type = $form_state->getFormObject()->getEntity();
  if (!$type instanceof NodeTypeInterface) {
    return;
  }

I have tested the provided patch #18 🐛 Unable to add content to a content type named 'type' Active and can confirm that it resolves the issue as described. The problem no longer occurs in Drupal 11.x
Thank you for the patch!

Isn't this a case of "it hurts when I do that/so stop doing that"? I don't know if it's still an issue, but having a theme and a module with the same machine name also resulted in conflicts. Is there a check for that now? Not everything can be checked.

Maybe this could just be put into documentation.