When using CSV importer on Custom Field Label, the CSV is not importing Custom Field of Label type correctly.

Step to reproduce

1. Create CSV files with multiple labels by entering each label in a separate column.
   
2. Import as usual by specifying the column with Custom Field Label.
   
3. Import Successful.
4. ONLY the first value was imported in Custom Field Label.
   

Expected Behavior
All the value in the column configure should import and form multiple value for Custom Field Label.

This does not happend with System Field of Labels