Update: I retook Saintonge from the british and now i have coring range to ireland and calais.
So here is my theory: the game isn't counting coring range from provinces taken in the peacedeal like it used to, it's counting it from current provinces. So since England was occupying Saintonge I bet that the game was calculating my coring range from Narbonne and Languedoc (in the mediterranean) instead of from Saintonge or Normandy (that I would have after peacedeal).
Also, burgundian succession happened
