QGIS » QGIS Application

Hi All,
when trying to add a field to a provider within API (python), if the source field is "int8" coming from a postgres provider, field is simply not added to target provider.

Here is the code :

field_list=[]
    for v in source_layer.values():
       field_list.append(v)
    new_provider.addAttributes( field_list ) 
    list_length = len(field_list)   --> number of fields from postgres source = n  OK
    provider_fields_count = len(new_provider.fields()) --> number of fields of target provider after "addAttribute" = n-(n int8 fields) : KO. New int8 fields disappear

When work around this this way:

Could that be corrected inside :

field_list=[]
    for v in layer_fields.values():
        f = QgsField(v)
        if (f.typeName() == "int8"):
              v = QgsField( f.name(), QVariant.Int)
        field_list.append(v)

Is it any know issue?
Cheers,
Régis