Add Missing Languages add-on not working when multiple source lngs. are used

[orangesunny]

Describe the issue

The Add Missing Languages add-on is not adding any translations if there are multiple source languages in use within the project.

I already tried

• I've read and searched the documentation.
• I've searched for similar issues in this repository.

Steps to reproduce the behavior

1. Set up a project
2. Add component with source English and translation German
3. Add component with source German and no translation
4. The add-on is not adding English to the second component

//works with any language combination

Expected behavior

The add-on sets the same language set in all components, no matter the source language or a number of different sources across the components.

Additional context

can be seen on TeamHero Weblate

[github-actions]

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