Title of node is erased when updating field

In my case the full node title is not erased but: I have titles like "@something" after the update the title is changed to "something" without the "@"

Yep the same for me. Changing an editable field value wipes out the node title.

I do not have this problem.
Do you use Automatic nodetitles ?
There has been some developments.
Is this still a problem with latest -dev from february the following patches?
#1206656: Error on Node view page: Argument 1 passed to drupal_array_get_nested_value()
#1405854: Multiple fields not saved

Or perhaps you are using Title module ?
in that case, this is a duplicate of #1449750: Title field does not save changes

I'm getting this too. I have a node with an editable field configured on the Manage Display page for a Select list field (called Status - Open or Closed) -- this is not via a view.

When ever I change the Status on the Node display, i get an Ajax error (attached). The status does get updated, but the node title disappears.

I don't have any title modifying modules installed.

@kruser, did you apply the follwing patches, which normally resolve your error?
#1405854: Multiple fields not saved
#1206656: Error on Node view page: Argument 1 passed to drupal_array_get_nested_value()

#1206656 fix the ajax error, but the title still got erased.
#1405854 fixed the title from being erased.

So yes, apply both patched fixed the error, Thanks!!

Perfect!