The wp_block post type is used for Reusable blocks. In order to clone a reusable block you need to edit the block and use Clone on update.
Once that's been done then you can use the [clone] shortcode on a parent post.
Before that the wp_block post is displayed with n/a.
Explanation
Posts of type wp_block do not have any post meta data, until they've been cloned.
So OIK_clone_tree_node::get_post_meta() can return null.
Hence the n/a.
The
wp_blockpost type is used for Reusable blocks. In order to clone a reusable block you need to edit the block and use Clone on update. Once that's been done then you can use the[clone]shortcode on a parent post. Before that thewp_blockpost is displayed withn/a.Explanation
Posts of type
wp_blockdo not have any post meta data, until they've been cloned. SoOIK_clone_tree_node::get_post_meta()can returnnull. Hence then/a.