First I created a carousel post by specifying a message and child_attachments. Then I updated it by specifying a different message and a different set of child_attachments.
But only the message got updated, not the carousel cards. I. e. child_attachments is ignored when requesting a post update.
How can I update the carousel cards? The API reference says "You can update the fields listed in the Publishing sections of the ..., /{page-id}/feed, ... edges." The child_attachments field is indeed listed in that section of the /{page-id}/feed edge.
I am using Graph API v2.5 and I tried this using the Graph API Explorer.
Update: Here is the post and below is the image of the API returning {"success": true} for an update that only partially happened. The image shows the description field to be "4 properties" whereas the post still shows 4 Homes. (Also the $ sign in the description is removed from 200k-500k but the post still shows it.)
