Not sure if bug, but knights now respawn dismounted. I've noticed that the draco now respawns units with their relics and other buffs now too, not sure if this is working as intended. (seems odd though, because units respawn with full hp, and the horse is a sort of hp for knights)
interesting... i`m thinking that probably druid and abjurer cannot make dismounted knight gain horse again.
That was an experimental change and should no longer happen.