All metrics for facebook stories returning value of 0

Hello! I'm trying to query the {page-post-id}/insights endpoint to retrieve metrics for facebook stories. My problem is that all post metrics I try return an incorrect value of 0.
Details about the page-post-id For the page post id, I'm using a string "{page_id}{media_id}". I've tried using {page_id}{post_id} as recommended by the docs, where the post_id is the value associated with the post key returned from the page/stories endpoint, but this alway yields a 400. Using the media_id returned from page/stories, I'm able to successfully query the story.
Details about the metrics I've tried to get nearly all metrics that are prefixed with "post_". All have returned 0, which I know to not be the correct value.
I've also tried retrieving specific metrics using {page-post-id}/reactions to no avail. Has anyone else run into this issue and found a workaround? Thanks!