Bug: Implicit controller methods failing

[MGatner]

Describe the bug
I don't have time to dig but my project feature tests work fine on 2901fdd but fail on latest develop whenever a route uses an implicit controller method. I suspect #3096 simply because it deals with routing but not sure of anything.

E.g.:

3) HomeTest::testGetHome
CodeIgniter\Exceptions\PageNotFoundException: Controller method is not found: index

/var/www/project/vendor/codeigniter4/codeigniter4/system/Exceptions/PageNotFoundException.php:14
/var/www/project/vendor/codeigniter4/codeigniter4/system/CodeIgniter.php:984
/var/www/project/vendor/codeigniter4/codeigniter4/system/CodeIgniter.php:327
/var/www/project/vendor/codeigniter4/codeigniter4/system/Test/FeatureTestTrait.php:158
/var/www/project/vendor/codeigniter4/codeigniter4/system/Test/FeatureTestTrait.php:184
/var/www/project/tests/features/HomeTest.php:9

CodeIgniter 4 version
develop

Affected module(s)
Routing, maybe Feature Tests.

Expected behavior, and steps to reproduce if appropriate
Running get('/') should load my home controller as mapped in app/Config/Routes.php

Context

• OS: Ubuntu 18.04
• Web server: Apache
• PHP version: 7.3

[MGatner]

Now I can't replicate this. I'm going to leave it overnight until I get back to the original project but might be a false alarm.

[MGatner]

Having the issue on GitHub Actions now.

[MGatner]

I've narrowed this down to a test that is causing the problem. Running the suite without it completes without issue, but with the test somehow messes with the Feature Test routes. There's nothing different about this feature test than the others, currently baffled but I will keep digging.