pooch
Whilst it is unusual for medicals to be held without the ESA50, it does happen, trying to take something positive from this, being assessed without your ESA50 does diminsh, but not remove the validity of the medical report.
With regard to the new ESA50, you need to contact the DWP as to why this has been sent. Whilst there is no reason why a new form should need to be completed before a Decision has been made, you do need to get written confirmation that you do not need to complete it to avoid further complications.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems