Posts under category Facebook Graph API

We noticed recently that not all posts are returned by the api for an instagram channel. Example channel: 17841400005735914 . It seems that posts that are limited to a certain geographic area are not returned. We are using a page access token to try retrieve the posts.

Hello! We at StreamYard are receiving this new error from FB since ~May 15 11pm CEST. We are receiving a few hundred a day.
Error: { code: 368 error_subcode: 4118001 fbtrace_id: "Ay3va_rnn4UTmVn2zJlqBOl" message: "An unknown error has occurred." type: "OAuthException" }
Do you have any suggestions? It happens on a POST on https://graph.facebook.com/v13.0/122953874226237/live_videos returning 400.

We have a production Meta Application and currently we use the Facebook Login for Business which generates a code that we exchange for a System User Access Token on our microservice. On production we can then use this System User Access Token to make a request to /me/accounts which returns the list of pages that we can access, along with an access token, see below:
{
"data": [
{
"access_token": "",
"id": "",
"tasks": [
"ADVERTISE",
"ANALYZE",
"CREATE_CONTENT",
"MESSAGING",
"MODERATE",
"MANAGE"
]
}
]
}
In production we are then able to take the PAGE_ACCESS_TOKEN from this response and make a request to {page-id}/ads_posts to get the Page Ad Posts for that particular page and all works fine and we get a response as we expect.
However, we also have test applications for our Development and Staging environments. When I perform the same actions, that being: 1. Get System User Access Token by Exchanging Code from Test App Facebook Login For Business 2. Use System User Access Token to make request to /me/accounts 3. Make request to {page-id}/ads_posts using the page access token.
I don't get a proper response from the API, instead I get:
{
"error": {
"message": "Cannot call API for app on behalf of user ",
"type": "OAuthException",
"code": 200,
"fbtrace_id": "AGld_EhayIp285qarsuYVAC"
}
}

When I submit review for my app the API suddenly stopped workin and return this error:
{ "error": { "message": "An unexpected error has occurred. Please retry your request later.", "type": "OAuthException", "is_transient": true, "code": 2, "fbtrace_id": "ADPvfazSrdwO0JyzJRZE4_x" } }