adjust filename

app/controllers/api/submission_documents_controller.rb

@@ -22,7 +22,7 @@ module Api
       render json: {
         id: @submission.id,
         documents: documents.map do |attachment|
-          { name: attachment.filename.base, url: ActiveStorage::Blob.proxy_url(attachment.blob, expires_at:) }
+          { name: FilenameUtils.basename(attachment.blob[:filename]), url: ActiveStorage::Blob.proxy_url(attachment.blob, expires_at:) }
         end
       }
     end