Symfony version(s) affected: 5.3.6

Description
When uploading to Loco by using push command, it appears (in Loco dashboard) dots have been replaced by hyphens, as push command seems to do this replacement and then fails once pull is done

How to reproduce

1. Create a project and install: composer require symfony/translation and Loco package by composer require symfony/loco-translation-provider and add configuration for locales and domains in translations.yaml. Also create a project in Loco (localise.biz) and configure its API_KEY for read and write permissions and place it in .env file (LOCO_DSN)
2. Create one controller and use TranslatorInterface to have at least one translatable keystring (with dots)
3. In the console: debug/translation to confirm there are missing strings (one in this case)
4. In the console: symfony console translation:update en --force to generate the local file under translations folder
5. In the console: translation:push to upload to Loco
6. Check in Loco that it was uploaded and appears incorrectly with hyphens and not with dots

Additional context
In the controller we have this line: $translated = $translator->trans('index.home.msg');

In the generated translations file under /translations folder we have these lines:

      <trans-unit id="FNdkzeB" resname="index.home.msg">
        <source>index.home.msg</source>
        <target>__index.home.msg</target>
      </trans-unit>

And in Loco we have this capture: