Localized Fields in Field Collection loses data after api import and save (6.6.3)


i wrote an import to an Object with Field Collections via PHP.
The imported data with via PHP Api appears if i open the object.

But if i add a value to a localized field input manually and save the object, all data in the localized fields which are in the Field Collection get lost.

I took a look in object_collection_collectionName_localized, the data is there before I save the object.
After saving it’s empty.

I followed the documentation by creating the PHP Api import.
But what is the problem?