Having one hitbox for Tilemap

I'm trying to make a one way tilemap with platform efector, there is a problem though, because the tilemap collider makes each tile have a collider, the player sticks mid way through the platform if he tries to move because of the colliders, like here OneWayTiles, the player can get through but can't go left or right because he gets stuck, I did figure out that if I take the sprites and make them a prefab they work, I put the box collider and the platform effector on the parent and it works with no problems, like here, so I do have a solution but it will just take too long drag and drop and change the size if I have to, is there a way I can keep it as a tilemap while not having this problem? thanks in advance.