Why does the player's health go back to 100 after resetting?

I made this script that's suppose to give the player more maxhealth based on their strength so a player with 1000 strength will have more health than someone with 10 strength. Everything works fine except when the player dies or resets their health goes back to 100/100 and the way to fix this is by gaining more strength then their health goes to what it should be.

Here's the script

local DefaultHealth = 100

game.Players.PlayerAdded:Connect(function(player)
    local Stats = player:WaitForChild("leaderstats")
    local Strength = Stats:FindFirstChild("strength")
    local char = player.Character or player.CharacterAdded:wait()
    if char then
        local hum = char:FindFirstChild("Humanoid")
        if hum then
            hum.MaxHealth = DefaultHealth * Strength.Value * 1.25
        end
        Strength.Changed:connect(function(value)
            if player.Character and player.Character:FindFirstChild("Humanoid") then
                player.Character.Humanoid.MaxHealth = DefaultHealth * Strength.Value * 1.25
            end
            player.CharacterAdded:connect(function(character)
                character:WaitForChild("Humanoid").MaxHealth = DefaultHealth * Strength.Value * 1.25
            end)
        end)
    end
end)

I have a healthbar that shows the health going to 100/100 after the player dies so if it could be something wrong in the gui's script let me know if i should post that script here aswell

edit: ok i've tested it and the gui is fine.