Having a chocobo companion out shouldn't have any effect on a DF queue. Rather, chocobo should be auto-dismissed when you enter the dungeon.

This makes me think of how we can't talk to an NPC or enter a city while riding a chocobo. Okay, fine! Then auto-dismount me off the chococbo!! No one would object to that! It's not like you're going to see angry threads like "how dare u dismount me without consent, now i am on my feets! unsubscribing!!"