flying handled as walking

so to set this glitch up is to have a horse into an npc with a repeating commandblock set up at the riding spot of the horse to teleport the player when entering the horse. if i do this while flying, the game thinks im walking and it acts very weird like it is handleing me like im walking whilst im actually flying. this causes the game to force me to the ground when i try to fly up and i have to leave flying state and re enter it to stop it.