The username does not appear in the comments on Instagram.

The username does not appear in the comments on Instagram.
When tested on two accounts One is that the username appears normally One does not show a username.
When you debug both tokens, the permissions are found to have been acquired equally.
Why does this happen?
account access_token debug - permissions
email, read_insights, pages_show_list, business_management, pages_messaging, instagram_basic, instagram_manage_comments, instagram_manage_insights, instagram_manage_messages, pages_read_engagement, pages_read_user_content, public_profile

pages_show_list - Applies to all objects
business_management - Applies to all objects
pages_messaging - Applies to all objects
instagram_basic - Applies to all objects
instagram_manage_comments - Applies to all objects
instagram_manage_insights - Applies to all objects
instagram_manage_messages - Applies to all objects
pages_read_engagement - Applies to all objects
pages_read_user_content - Applies to all objects
Query used
178****************6/comments?fields=hidden,id,like_count,media{id,shortcode},replies{text,media,timestamp,username,user,id,like_count,hidden,parent_id},text,timestamp,username,parent_id,user,from&limit=5
When operating normally
{
"hidden": false,
"id": "1805**********3",
"like_count": 0,
"media": {
"id": "184******26",
"shortcode": "C_******Q"
},
"text": "***********",
"timestamp": "2024-09-03T14:18:09+0000",
"username": "k*****i",
"from": {
"id": "90697*********133",
"username": "k********i"
}
},
If an error has occurred
{
"hidden": false,
"id": "18***********03",
"like_count": 0,
"media": {
"id": "178510*********46",
"shortcode": "C******c-"
},
"text": "**************",
"timestamp": "2024-09-06T06:13:53+0000"
},