Yeah, I'm seeing the same thing.
With this fix, when you create the node and do the auto complete, it pulls up Last Name, First Name (as it should).
When you go back and edit the node you'll see that the value of that field has been changed to Last Name, First Name [cid:123].
If you try to save this node without changing anything you'll get the error, "CiviCRM Contact: found no valid post with that title."
If you manually delete the [cid:123] from the field you can save without any errors.
So, the question is where is that [cid] getting set and how do we prevent it or hide it when editing the node?
I searched through the civi module, but can't seem to find where this is happening. Does anyone else have any ideas?