Symfony version(s) affected: 4.4.19

Description
After upgrading from 4.4.18 to 4.4.19, my custom translation messages for the security domain is no longer being used.

How to reproduce

1. Create translations/security.en.yml with the following contents:

   "Invalid credentials.": Custom Message!

2. My translator config looks like the following:

   framework:
       default_locale: en
       translator:
           default_path: '%kernel.project_dir%/translations'
           fallbacks:
               - en

3. In a twig template:

   {{ 'Invalid credentials.'|trans([], 'security') }} {# resolves to "Invalid credentials." but expected "Custom Message!" #}

Possible Solution
I looked though the changes from 4.4.18 to 4.4.19 but couldn't pinpoint exactly what caused this bug.

Additional context
I can work on a reproducer. Reproducer: https://github.com/kbond/symfony-reproducer/tree/bug/trans-domain:

• Commit demonstrating issue on 4.4.19
• Commit that fixes issue (by downgrading to 4.4.18)