Hello!
It looks like no matter what in Korthia/Maw the “Summon Random Favorite Mount” button will never summon a non flying mount. I have Ashes, Dark Phoenix, Dreadsteed, and Raven Lord selected as my favorites but while in Korthia/Maw but it will only select between Ashes and the Dark Phoenix mounts.
It’s minor but I figure it’d be an easy fix and if you’re re-using whatever code you use to disable flying mounts in other zones in Korthia/Maw for future expansions it’d be nice.
I will note in other zones like Oribos it will give you the ground mounts, also if you don’t have flying when you’re leveling an alt it wont only select flying mounts, so whatever is different in these zones is the culprit.