Is it an FE related problem or something else or am I doing something ridiculously wrong?

I'm trying to make it so that this script that records the player's X, Y and Z positions starts functioning after pressing some GUI button.

local character = script.Parent
local player = game.Players:GetPlayerFromCharacter(character)
local HRP = character:WaitForChild("HumanoidRootPart")
local X = player:WaitForChild("XPosition")
local Y = player:WaitForChild("YPosition")
local Z = player:WaitForChild("ZPosition")

repeat wait() until player.Place.Value == "notSpawn"

while true do
    X.Value = HRP.Position.X
    Y.Value = HRP.Position.Y
    Z.Value = HRP.Position.Z
    wait(0.5)
end

The button has a local script that basically changes the value of "Place" which is a "StringValue" in the character to "notSpawn". For some reason, it just never works when FilteringEnabled is on or off. So I don't think it's an FE related problem??

Or is it maybe the repeat function does not update when the value changes?? I'm really really not sure what's going on anymore... Ugh...