I created applications using two Facebook accounts and added the same Facebook account to both applications as a developer account. The application mode is under development, In the first application, call {page-id}/conversations? Fields=id, name, participants, messages {id, from, message, to, attachments {id, image_data, name, video_data, file_url}, shares {id, name, link, description, template}, creatd_time}, updated_time&platform=Instagram. When obtaining private message data of the bound Instagram account through the Facebook public main page ID, conversation message data can be obtained

But in the second application, call {page-id}/conversations? Fields=id, name, participants, messages {id, from, message, to, attachments {id, image_data, name, video_data, file_url}, shares {id, name, link, description, template}, creatd_time}, updated_time&platform=Instagram. When Instagram retrieves private message data of a bound Instagram account through the Facebook public main page ID, the response result is: { data:[] } No errors reported, only an empty array displayed without any dialogue message data Why is this?