Ok, when you say the first do you mean the renounce decision or something else?
Mind elaborating on the title loss issues?
You know there is system that New Ecumenical Patriarch takes Diocese of Constantinople over if we install new bishop. It is broken prob due to Chalcedonian modification.
(Definitely it is completely broken in Charlmange and OldGods since it uses united Chalcedonian instead of Orthodox.)
(Since Diocese of Constantinople will be automatically passed over to proper patriarch when iconoclasm is renounced, this isnt problem in Charlmange. Howver, whenever there is improper patriarch in Constantinople and we revoke his title and replace sees with new bishop, that new bishop fails to take Patriarche over.)
There is some ambiguous bugs with title succession and loss. For example, Pope losses his title when Patriarche of Primous Inter Paras shows up. (Though nobody holds it)
Or, sometimes title gets lost in succession although succession law does not allow title loss in succession.
Or, sometimes title don't break apart when it need to brake apart (I need more investigation for this. Several Korean testers reported this but it is not quite certain.)
Or, often Pentarch titles does not show up in religion tab. (I think it gets created when sees are restored but it does not show up in religion tab when it does not have holder