ratings?fields=open_graph_story doesn't return all stories anymore

[mhkita]

Hi,

I noticed that ratings?fields=open_graph_story doesn't return all stories as it used to be.
I tried to fetch data through php code and Graph API Explorer, both return same result

this is my php code:
$facebook->sendRequest('GET', $Pageid.'/ratings', ['fields' => 'open_graph_story,rating'])->getDecodedBody();

and it returns

{
"data": [
{
"open_graph_story": {"id": "xxxxxxxxxxx"},
"rating": 5
},
{
"open_graph_story": {"id": "xxxxxxxxxxx",},
"rating": 5
},
{
"rating": 5
},
{
"rating": 5
},
{
"rating": 5
},
{
"rating": 5
},
{
"open_graph_story": {"id": "xxxxxxxxxxx"},
"rating": 5
},
{
"rating": 5
}
]}

the page has 8 ratings, but only 3 ratings returned with open_graph_story.
any reason why it doesn't return all stories?

I notice that no story returned for ratings older than dec 2018.

[adrianlaraperez88]

@mhkita all reviews(recommendations) created before August 2018 not have these fields