I tried to make a behaviour pack that makes mob stay still when you look at them

tried using repeat command block

/execute @a ^ ^ ^64 effect @e[r=64,type=!player] slowness 1 255

and it works. no problem.

so i put all that command into a mcfunction file and add a tick.json

put the behaviour pack and load a world.

the function is still there, but theres something wrong, the direction of the function is z+ not where im looking at.

i tried to fix it by doubling the execute

execute @a ~ ~ ~ execute @s ^ ^ ^64 effect @e[r=64,type=!player] slowness 1 255

get in the world, and the problem is still there

is this a bug? any solution to prevent this?