How do I make spawned ped mount up player's horse as a passenger

Hello! I'm very new to modding and programming in general.

I'm trying to make a spawned ped automatically mount my horse when I mount up. However, I can't seem to get it to work properly. The ped just stands there and does nothing. Sometimes, they mount the horse only after I dismount.

Here's the code I'm using:

Ped playerPed = PLAYER::PLAYER_PED_ID();

if (PED::IS_PED_ON_MOUNT(playerPed))
{
    Entity playerHorse = PED::GET_MOUNT(playerPed);

    if (companionPed && ENTITY::DOES_ENTITY_EXIST(companionPed) && !ENTITY::IS_ENTITY_DEAD(companionPed))
    {
        if (!PED::IS_PED_ON_MOUNT(companionPed) || PED::GET_MOUNT(companionPed) != playerHorse)
        {
            TASK::CLEAR_PED_TASKS(companionPed, false, false);
            TASK::TASK_MOUNT_ANIMAL(companionPed, playerHorse, -1, 0, 2.0f, 0, 0, 0);
            PED::SET_PED_KEEP_TASK(companionPed, true);
        }
    }
}

I also tried setting the seat index to 1, but it didn’t work either.

If anyone can help me figure out what I’m doing wrong, I’d really appreciate it!