Without looking at the exact full data exchange, I can't say for certain. I don't even know if the trigger is as I think it might be.
But you can get a sense of where the information for the magazine account is by looking at this sample payload of what it looks like when a new Article/Thread is created and federated out. There is no "inReplyTo" because this is the initial thread/article, but it would point to the direct url for a previous content, not the magazine.
{
"@context":
[
"https://www.w3.org/ns/activitystreams",
"https://w3id.org/security/v1",
{
"ostatus": "http://ostatus.org#",
"sensitive": "as:sensitive",
"votersCount": "toot:votersCount"
}
],
"id": "https://kbindomain/m/testmagazine/t/16",
"type": "Create",
"actor": "https://kbindomain/u/demouser",
"published": "2023-06-17T18:58:26+00:00",
"to":
[
"https://kbindomain/m/testmagazine",
"https://www.w3.org/ns/activitystreams#Public"
],
"cc":
[
"https://kbindomain/u/demouser/followers"
],
"object":
{
"id": "https://kbindomain/m/testmagazine/t/1676",
"type": "Page",
"attributedTo": "https://kbindomain/u/demouser",
"inReplyTo": null,
"to":
[
"https://kbindomain/m/testmagazine",
"https://www.w3.org/ns/activitystreams#Public"
],
"cc":
[
"https://kbindomain/u/demouser/followers"
],
"name": "Federation Test",
"content": "<p>Test for the body of the article</p>n",
"summary": "Test for the body of the article #testmagazine",
"mediaType": "text/html",
"url": "https://kbindomain/m/testmagazine/t/1676",
"tag":
[
{
"type": "Hashtag",
"href": "https://kbindomain/tag/testmagazine",
"tag": "#testmagazine"
}
],
"commentsEnabled": true,
"sensitive": false,
"stickied": false,
"published": "2023-06-17T18:58:26+00:00",
"contentMap":
{
"en": "<p>Test for the body of the article</p>n"
}
}
}