Hello, I apologize if I should be more specific, if more info is needed I can try to include what else I can!

There seemed to be an issue in the Diadem exploration where my Ceremony Chocobo and Amber Draught Chocobo were unusable mounts. They display as greyed out and when I attempt to summon them, I get a message to the likes of "companions may not be summoned here".

At first I thought it was because two seater flying mounts were disallowed there, but the wording has me thinking it's a bug where the mounts were mistakenly flagged as companions. Others I asked who had the Ceremony chocobo seemed to have the same problem.