Item (display only) element results in an empty string in form_state values

Unsure if we need such global form API changes (as it affects many things)

Maybe better work on it from Item render element

This issue can be easily fixed when you use '#input' => FALSE, for your item element

Can someone please list down the "Steps to reproduce"? Thanks

The #input allowed with a big comment in #1825044: Turn contact form submissions into full-blown Contact Message entities, without storage

OLD code

  // Form structure.
  $types['item'] = array(
    // Forms that show author fields to both anonymous and authenticated users
    // need to dynamically switch between #type 'textfield' and #type 'item' to
    // automatically take over the authenticated user's information. Therefore,
    // we allow #type 'item' to receive input, which is internally assigned by
    // Form API based on the #default_value or #value properties.
    '#input' => TRUE,

Probably better to move the hack to contact module as no input expected from the item form element