Could not install Redirect together with Pathauto if I add them as additional projects

Problem / Motivation

I am trying to create a simplytest.me website using both the Redirect and Pathauto modules. Simplytest.me is demanding a version of Redirect which does not apparently exist yet or a patch I did not request.

Steps (workflow 1 - first added project has a version number which is less than the second added project):
1. Go to SimplyTest website
2. In the Evaluate Drupal projects field, type core
3. In the auto-suggest, choose Drupal core
4. Click Advanced options
5. Click Add additional project
6. In the Project name field, type redirect
7. In the auto-suggest, choose Redirect
8. Click Add additional project
9. In the Project name field, type pathauto
10. In the auto-suggest, choose Pathauto
11. Do not add any patches on anything; do not click in the patch fields

12. Click Build

Expected result: I get a test website with the pathauto and redirect modules included.

Actual result: Build gets an error:

This may be the error:

In PatchAddCommand.php line 75:

Your patch url argument must be a valid URL or local path.

patch-add [--no-update] [--no-dev] [--] <package> <description>

Steps (workflow 2 - first added project has a version number which is greater than the second added project):
1. Go to SimplyTest website
2. In the Evaluate Drupal projects field, type core
3. In the auto-suggest, choose Drupal core
4. Click Advanced options
5. Click Add additional project
6. In the Project name field, type pathauto
7. In the auto-suggest, choose Pathauto
8. Click Add additional project
9. In the Project name field, type redirect
10. In the auto-suggest, choose Redirect
11. Do not add any patches on anything; do not click in the patch fields

12. Click Build

Expected result: I get a test website with the pathauto and redirect modules included.

Actual result: Build gets an error:

This may be the error:

Installation failed, reverting ./composer.json and ./composer.lock to their original content.
Command Failed (Tugboat Error 1064): Exit code: 2; Command: cd stm && composer require drupal/redirect:1.13 --no-install

On the date of this error, the latest version of Redirect is 1.11 and the latest version of Pathauto is 1.13.

However, the following sequences work:

Steps (workflow 3):
1. Go to SimplyTest website
2. In the Evaluate Drupal projects field, type redirect
3. In the auto-suggest, choose Redirect
4. Click Advanced options
5. Click Add additional project
6. In the Project name field, type pathauto
7. In the auto-suggest, choose Pathauto
8. Click Build

Expected and actual results: I get a test website with the pathauto and redirect modules included.

Steps (workflow 4):
1. Go to SimplyTest website
2. In the Evaluate Drupal projects field, type pathauto
3. In the auto-suggest, choose Pathauto
4. Click Advanced options
5. Click Add additional project
6. In the Project name field, type redirect
7. In the auto-suggest, choose Redirect
8. Click Build

Expected and actual results: I get a test website with the pathauto and redirect modules included.