It happens because there isn't anything happening from either side.
Nothing further from the US side after that one public statement (which BBC noted was a breach of the confidentiality unsually associated with MLAs). Only the one statement, denying the US assertion of non-cooperation from PA.
So there really isn't anything else going on, and quite a lot of other stuff vying for attention. If he was caught on camera in public, or did any activities (eg with a charity) it would be bound to attract comment.
But he's just staying put, living out of sight, and will probably stay they way for some time.