Menu Tab Missing on Node Page

Glad you figured it out!

The bug is there. When you save one node type, nodequeue settings of other node types are getting changed.

The problem is in the new nodequeue_form_node_type_form_submit() function:

...
   }
    else {
      $key = array_search($type, $types);
      unset($types[$key]);
    }
...

If node type $type isn't found in the queues $types then $key = FALSE;

PHP:

Bools are cast to integers, too, i.e. the key true will actually be stored under 1 and the key false under 0.

So unset($types[FALSE]) is equal to unset($types[0]).

And you Disable the first node content type from the $queue->types, whatever it is.

You should check var type of array_search() result as well.

It can be something like:

...
    }
    else {
      $key = array_search($type, $types);
      if ($key !== FALSE) {
        unset($types[$key]);
      }
    }
...

Rolled patch against 7.x-2.2 for #4. Thanks, Sergii.

Thanks for the fix @ergii Pryma and for the patch @happysnowmantech. This has been committed and will be included in the next release.