scoreboard players add @s[scores={dummy_y=..-4096}] dummy_y 4096

execute unless score @s dummy_y matches ..-2048 run function bd:control/warp/warp_to_saved_coords/y/n1024
execute if score @s dummy_y matches ..-2048 positioned ~ ~-2048 ~ run function bd:control/warp/warp_to_saved_coords/y/n1024