After the last update I get these errors and the list of the post seems to have problems:
I updated to 4.3.5 and we are having the same problem. A previous upgrade also had a similar problem. Where the change was to ‘post_status’ in the post_object.php
Ok, i’ve add this code on line 496 and fixed the notice:
$post_type_object = get_post_type_object( get_post_type() );
if ( empty( $title ) ) {
$title .= $post_type_object->labels->singular_name;
}