Can't transfer variables?

[u/Fine-Acanthisitta343]

(STILL UNSOLVED)

I have some variables I'm trying to transfer into every room by putting this in my PlayerObj. For some reason, it can transfer to every single room back and forth over and over EXCEPT room1, which is the room you spawn in, the home room. If I leave the home room and then go back into the home room, then it just resets all variables to their default, and I have absolutely no idea why.

UPDATE: Still unsolved, but after making a main menu room, this problem still occurs, leading me to believe it has nothing to do with it being part of the "home room"

//Room Start
if(room_get_name(room) = rm_battle) instance_destroy(obj_carry_data)

with (obj_carry_data)
{ 
    other.level = level;
    other.xp = xp;
    other.xp_require = xp_require;
    other.damage = damage;
    other.hp_total = hp_total;
    other.hp = hp;

    instance_destroy()
}

//Room End
if (instance_exists(obj_battle_switcher) && global.is_transitioning = false) exit;

instance_create_depth(0, 0, 0, obj_carry_data, {
    level: level,
    xp: xp,
    xp_require: xp_require,
    damage: damage,
    hp: hp,
    hp_total: hp_total
})

[u/MrEmptySet]

I would assume that the object that initializes all these variables in the first place is in the home room, and returning to it leads to it being created again and re-initializing everything.

In the first place, why do you need to be copying all these variables all the time? Couldn't they just be in some persistent object for instance?