`wp_set_script_translations` with `wp.i18n` does not return translated strings in simple plugin

Short description:

I try to translate strings in JS file. To test it I decided to create a simple test plugin. I have PHP and JS strings there. Translated PHP strings work fine, JS strings don’t work.

Tools and environment:

Plugin PHP file content:

Plugin JS file content:

Procedure for creating translation files:

Language files structure after performing the steps above:

The content of test-de_DE.po that was used to create the MO and JSON

Result on my test website:

Additional context:

Plugin files structure: