HealthBar won't resize itself based on player's health, what's wrong?

Please note that my game is Filtered Enabled and there is a remote event I'm using to apply changes.

P.S. There are no errors in output either.

--//LOCALSCRIPT

--//Variables
local plr = game.Players.LocalPlayer
local chr = plr.Character
local hum = chr.Humanoid
local bar = script.Parent.Parent
local hbar = script.Parent
local htxt = script.Parent.TextLabel
repeat wait() until plr.chr
local healthMath = hum.Health / (hum.MaxHealth)
local replicatedStorage = game:GetService("ReplicatedStorage")
local healthEvent = replicatedStorage.healthEvent

--//Booleans
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Health, false)

--//Scripting
plr.hum.HealthChanged:Connect(function(health)
    healthEvent:FireServer()
end)

--//SCRIPT

--// Variables
local replicatedStorage = game:GetService("ReplicatedStorage")
local healthEvent = replicatedStorage.healthEvent

--// Scripting

local function onHealthChanged(player)
    local hum = player.Character:WaitForChild("Humanoid")
    local healthMath = hum.Health / (hum.MaxHealth)
    local hBar = player.PlayerGui.healthAssets.healthBar
    hBar:TweenSize(UDim.new(healthMath, 0, 1, 0), "Out", "Sine", .2)
end

There are no errors in output either.