What can cause animation stuttering like this?

So just recently my animations started to suddenly stutter for no reason, i've checked the code, tried older code, tried playing them alone with the dev console, still happens.

I also tried reuploading the animations wich are much smoother and still nothing changes.

Example of stuttering

Uploaded Animation

Code I use to play the equip and unequip animations

local debounce = false
function onKeyPressed(Input, Chatting)
	if Chatting then
		do return end
	else
		if not debounce then
			debounce = true
			if Input.KeyCode == Enum.KeyCode.E and canequip == true and isattacking == false and isblocking == false then
				equipTrack:Play()
				wait(equipTrack.length)
				equippedTrack:Play()
				canattack = true
				canequip = false
			elseif Input.KeyCode == Enum.KeyCode.E and canequip == false and isattacking == false and isblocking == false then
				canattack = false
				unequipTrack:Play()
				equippedTrack:Stop()
				wait(unequipTrack.length)
				canequip = true
			end
			debounce = false
		end
	end
end
uis.InputBegan:Connect(onKeyPressed)