If you have encountered this:
Try free-typing a news post and post it to see if the same occurs.
If you are copying and pasting the text, ensure to strip the text of all formatting.
If the issue persists, raise a case and:
Grant us impersonation rights, after you confirm with the engineer the email address you need to give access to.
Confirm the news post title.
Send a recording showing how the post is being added.