metatag_entity_view() should only run once

Hy,

I have a node with Entity Reference field.
During page load, the function metatag_entity_view is called once.
Problem on call : entity ID is not the node ID of the page but a referenced node ID... function end and the metatags are empty !

It is necessary that the function is called more than once.
If I delete the patch metatag work properly.

The solution may be to move the patch after the line :

// Only proceed if this entity object is the page being viewed.
  if (_metatag_entity_is_page($entity_type, $entity)) {

or maybe not ?

I'm still encounter that issue in last release version.
I'm using CTools, first call comes from ctools_node_content_render_node() plugin, which invoke full entity_view.
And second comes from metatag_ctools_render_alter().

And usage of $i_will_say_this_only_once does not help because metatag_entity_view() called second tiome with $force flag.
What's the reason to have that flag and use it in metatag_ctools_render_alter()?

With a node with comment, _metatag_entity_is_page('comment', $comment) will return TRUE and $i_will_say_this_only_once will be set to true, and this will never triggered for node.