Some of you might have encountered this as well.

While your Chocobo was in your party and after talking to a certain NPC.
You were able to fly a dragon mount while still having your Chocobo on your party list.

Usually, when your chocobo is out in the open fighting with you, you are not able to call upon a different mount to ride/fly unless it's the same Chocobo in your party.

In this video, it shows that I was able to fly the dragon mount while still having the Chocobo "out" meaning, the Chocobo in my party.

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Video may contain spoilers

Here is the youtube video

Video may contain spoilers
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It just makes me think... if it is possible to ride a different mount while your chocobo is in your party, why is it disabled by default?

I know that this was a possible through a glitch?, but the question still stands.