Why Won't My Animation Play Consistently?

So, I created an animation that is supposed to play globally while a certain key is held down (panting while holding 'r'). It usually works (meaning, everyone can see the animation and it repeats indefinitely until the key is released); however, sometimes it will simply stop doing the animation or only show it for the player that is holding 'r' (as if it was played locally). My relevant code is shown below. It is all within a local script (I thought this would make it play locally 100% of the time, but it frequently plays for everyone too, so I don't really think that's the problem).

m.KeyDown:connect(function(key)
	local player = game.Players.LocalPlayer
	if key == "r" and player.Character.Humanoid.WalkSpeed == 16 then -- Holding down 'R'
		game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, false)
		player.Character.Humanoid:UnequipTools() -- unequips all equipped tools.
		for i, Tools in pairs(player.Backpack:GetChildren()) do
	    	if Tools:IsA("Tool") then
	       		Tools.Enabled = false
	    	end
		end
		local animation = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(script.Panting)
		game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 0
		game.Players.LocalPlayer.Character.Humanoid.JumpPower = 0
		wait(.5) -- kinda a penalty for even deciding to rest, and keeps animation from glitching
		animation:Play()
		script.Parent.Stats.Frame.StaminaQuantity.StaminaRegen.Disabled = true
		script.Parent.Stats.Frame.StaminaQuantity.RestStaminaRegen.Disabled = false
	end
end)

If anyone has any idea why this is broken, I'd appreciate it so much. Thanks!

got this far and got bored and gave up but you might be able to salvage the script into something that works

local player = game.Players.LocalPlayer
local m = player:GetMouse()
local Human = player.Character:WaitForChild("Humanoid")
local animation = Human:LoadAnimation(script.Panting)
local bagdebounce = false
m.KeyDown:Connect(function(key)
    local player = game.Players.LocalPlayer
    if key == "r" and player.Character.Humanoid.WalkSpeed == 16 then
	repeat
	if bagdebounce == false then
	    game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, false)
        player.Character.Humanoid:UnequipTools()
        for i, Tools in pairs(player.Backpack:GetChildren()) do
            if Tools:IsA("Tool") then
                Tools.Enabled = false
            end
        end
	bagdebounce = true
	end
        Human.WalkSpeed = 0
        Human.JumpPower = 0
        wait(.5)
        animation:Play()
        --script.Parent.Stats.Frame.StaminaQuantity.StaminaRegen.Disabled = true
       -- script.Parent.Stats.Frame.StaminaQuantity.RestStaminaRegen.Disabled = false
	until key == not "r"
    end
bagdebounce = false
Human.WalkSpeed = 16
Human.JumpPower = 50
animation:Stop()
end)