Why does my NPC stop moving when using a repeat wait() loop?

Hello, I've been working on my NPC for abit now and i've managed to find a few threads on pathfinding about using a repeat wait loop in order to make the npc to transition smoothly between each parts instead of being jittery.

Here is my code:

--/// Variables 
local Target
local PathfindingService = game:GetService("PathfindingService")

local NPC = script.Parent
	local Humanoid = NPC.Humanoid
	local RootPart = NPC.HumanoidRootPart
	

--Temporary!!!
game.Players.Changed:Connect(function()
	--/// Random plr Target
	if #game.Players:GetPlayers() >=2 then
		local rndTarget = workspace:FindFirstChild(game.Players:GetPlayers()[math.random(#game.Players:GetPlayers())])
		game.Players:GetPlayers()[rndTarget].CharacterAdded:wait()
		Target = rndTarget.Character:WaitForChild("HumanoidRootPart")
	else
		game.Players:GetPlayers()[1].CharacterAdded:wait()			
		Target = game.Players:GetPlayers()[1].Character:WaitForChild("HumanoidRootPart")
	end
	----
end)
----



-- Main
while true do wait()
	local Start = RootPart.Position
	local Goal = Vector3.new(Target.Position.X -7,Target.Position.Y, Target.Position.Z)
	
	local Path = PathfindingService:FindPathAsync(Start, Goal) -- Makes a path from the starting Point (RootPoint) to the Goal (Target)
	
	if Path.Status == Enum.PathStatus.Success then -- Makes sure that the path is valid
		
		local Waypoints = Path:GetWaypoints() -- gathers all the points		
		for i, Waypoint in pairs(Waypoints) do -- for each point do
			Humanoid:MoveTo(Waypoint.Position) -- Moves to each individual point
			
			
			
			if Waypoint.Action == Enum.PathWaypointAction.Jump then -- Jumping Phase
				Humanoid.Jump = true				
			end			
			
			repeat wait()
				Distance = (Start - Waypoint.Position).magnitude
			until Distance < 3
			
			
			
		end 
	end
end

My NPC moves 2-3 studs then stops completely. And the script essentially breaks. Is that what the until part of it does?