Currently the dodge bonus for dragon touched armor does not stack with the dodge bonus of chattering ring, which makes this odd pairing the only dodge bonus that does not stack with other dodge bonuses.

Could we get a dev response on whether this is working as intended or a bug that will be fixed?

As things currently stand, a player who has the chattering ring and the icy raiment cannot craft armor unless they are willing to take a -4 AC hit. If this dodge bonus was changed to stack (like other dodge bonuses), then these players would have the option of taking a -1 AC hit in exchage for freeing up one or more item slots. Personally, I would find this very appealing, so I hope the developers decide to make the dragon touched armor dodge bonus stack like all the others.