diff --git a/app/models/metadata_array.rb b/app/models/metadata_array.rb
index a1ff8c72..b65fd34e 100644
--- a/app/models/metadata_array.rb
+++ b/app/models/metadata_array.rb
@@ -7,6 +7,12 @@ class MetadataArray < MetadataTemplate
     super || []
   end
 
+  # Los Arrays no se pueden cifrar todavía
+  # TODO: Cifrar y decifrar arrays
+  def private?
+    false
+  end
+
   private
 
   def sanitize(values)
@@ -16,6 +22,6 @@ class MetadataArray < MetadataTemplate
       else
         v
       end
-    end
+    end.select(&:present?)
   end
 end
diff --git a/app/views/posts/attributes/_array.haml b/app/views/posts/attributes/_array.haml
index 73e96dea..da9ec654 100644
--- a/app/views/posts/attributes/_array.haml
+++ b/app/views/posts/attributes/_array.haml
@@ -1,5 +1,6 @@
 .form-group
   = label_tag "#{base}_#{attribute}", post_label_t(attribute, post: post)
+  = hidden_field_tag "#{base}[#{attribute}][]", ''
 
   .taggable{ dir: dir, lang: locale, data: { values: metadata.value.to_json,
     name: "#{base}[#{attribute}][]", list: id_for_datalist(attribute),