Not sure if this is intentional or not, but celestial wings is the only mount I know of that doesn't have any spacebar emote. The devs should probably add an emote for this mount. The divine wings mount probably has same issue but can't test that for you.
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PVP Rogue,
--[----- "Your friendly neighborhood spawn of Satan." -----]--
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Main Character: Hurricane Marigolds (Rogue WK & Assassin)
Ingame Handle: trgluestickz
Discord Name: Hurricane🌀Marigolds#2563
Guilds: She Looked LVL 18 & Essence of Aggression
Alliances: Imperium & Order of the Silent Shroud
Platform: PC
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Comments
After all, it's a winged mount, and you aren't expected to take damage from high falls