Translated media loses file if you set mapping from the file to the name

I experienced a similar issue.

• Multilanguage site
• Media document type with Field Mapping Name set to Name.
• Original language media document working OK
• On the translated version each time media translation saved, the media name reverted to filename.
• Change mapping to -Skip Field- issue solved

@hatuhay The issue you describe, sounds more like 🐛 After exposing media image's name field and translating it, it gets overwritten by the default field mapping. Active .

As for this issue, as somewhere along in the submit process, the new file data is incorrectly injected in the file reference field of the Media entity.
In my case, the filename is injected as target_id instead of the actual file ID. This is visible in $this->entity in \Drupal\media\MediaForm::save() .
Not sure yet where fault originates.

It seems this issue is resolved in 10.2.1 (didn't test in 10.2.0).