I changed the row in appearance.2da with a row I found in CEP. There are differences but I don’t know, which parameter causes the animation not to work.
Maybe someone else sees the significant difference, see attachment: app.zip (579 Bytes)
My guess would be modeltype:
S (Simple) VS FW (Full with Wings)
XP3 horses which also use h_ba as animations supermodel have their modeltype set to F (the Wing part not being relevant) while most non-mount animals use S.