SharePoint news post author changed after copying site page

Hi,

I have a Microsoft Power Automate flow in place that allows me to automatically copy a site page to another site in SharePoint, and then promote it as news.

Since a couple of weeks our users report an issue wherein they mention that the author in the page headers are changed.

I use the default 'Copy file' action in Power Automate to copy the initial site page. Then I promote the site page as a news post using the SharePoint REST API by the _api/sitepages/pages(x)/PromoteToNews endpoint. At last, I use _api/sitepages/pages(x)/Publish endpoint to publish the newly copied news post.

Previously, the author was kept correctly. But since a couple of weeks the author in the page title header is replaced with a seemingly random user.

Does anyone else have this issue? And how can I prevent this from happening?

Many thanks for all help provided!