(Repost, old wasn't answered) Why isn't my humanoid acting right?

I have tried using WaitForChild and Variables to refer to my Humanoid, it is being found, it can be printed and can have values read. The thing is: Humanoid:ChangeState() and changing health with Humanoid:TakeDamage() wont do anything.

Here's a snippet of my revival code.

function ReviveModule.Revive(Character)
    local Humanoid = Character.Humanoid
    Humanoid:ChangeState(Enum.HumanoidStateType.GettingUp)
    for i=Humanoid.Health,Humanoid.MaxHealth,1 do
        wait()
        Humanoid:TakeDamage(-1)
    end
    print(Humanoid.Name.. " revived successfully!")
end

I've tried it with a LocalScript before (exact same method) and it works as expected. Is it something to do with it not being local?

EDIT: Testing with a WaitForChild() instead of indexing the humanoid directly also does not work It still prints the "Humanoid revived successfully!" message.

Here is a video of what happens.

Here