Model's descendants disappear when passed in function's parameters

[MrMatthewGamingX (MrMatthewGaming)]

I have a building system I adapted to work for placing farmland.

This function handles the events for the hoe tool. It’s hooked up to CollectionService events.

local function HoeEvents(Hoe)
	local ActiveHoe = nil
	Hoe.Equipped:Connect(function()
		ActiveHoe = Hoe
	end)
	Hoe.Unequipped:Connect(function()
		if ActiveHoe == Hoe then
			ActiveHoe = nil
		end
	end)
	UIS.InputBegan:Connect(function(input)
		if not ActiveHoe then return end
		if input.KeyCode == Enum.KeyCode.F and ClientState.BuildMode == false then
			TillingMode = not TillingMode
			if TillingMode then
				local FarmlandSquare = BuildingFolder.Hollogram.FarmlandSquare:Clone()
				FarmlandSquare.Parent = workspace
				warn(FarmlandSquare,FarmlandSquare:GetDescendants(),FarmlandSquare.PrimaryPart)
					UpdatePosition(FarmlandSquare,true)
				CurrentItem = FarmlandSquare
				PlacingState = true
				UpdateClickDetector()
			else
				if CurrentItem then
					CurrentItem:Destroy()
				end
				PlacingState = false
			end
		end
	end)
	Hoe.Activated:Connect(function()
		if GoodToPlace then
			game.ReplicatedStorage.PlaceBuildingItem:FireServer(CurrentItem.Name,CurrentItem:GetPrimaryPartCFrame(),LockedItem,true)
		end
	end)
	game.ReplicatedStorage.Tools.HoeBroke.OnClientEvent:Connect(function()
		CurrentItem:Destroy()
		RenderSteppedConnection:Disconnect()
		RenderSteppedConnection = nil
	end)
end

This part of the function clones the hollogram of the farmland to the workspace so it can be dragged around on screen

local FarmlandSquare = BuildingFolder.Hollogram.FarmlandSquare:Clone()
				FarmlandSquare.Parent = workspace
				warn(FarmlandSquare,FarmlandSquare:GetDescendants(),FarmlandSquare.PrimaryPart)
					UpdatePosition(FarmlandSquare,true)
				CurrentItem = FarmlandSquare
				PlacingState = true
				UpdateClickDetector()

The warn() statement prints a set of descendants and the primary part.

However, when I pass it to the UpdatePosition() function, the Farmland no longer has any descendants

local function UpdatePosition(BuildingItem,TerrainParams)
	local IgnoreList = {BuildingItem,Character}
	local Params = RaycastParams.new()
	Params.FilterDescendantsInstances = IgnoreList
	RenderSteppedConnection = game:GetService("RunService").RenderStepped:Connect(function()
		local RaycastResult = workspace:Raycast(Mouse.UnitRay.Origin, Mouse.UnitRay.Direction * 1000, Params)
		local Hit, Position = RaycastResult and RaycastResult.Instance, RaycastResult and RaycastResult.Position
		
		local MaterialAllowed = false
		if TerrainParams and Hit == workspace.Terrain then
			if RaycastResult.Material == Enum.Material.Grass or RaycastResult.Material == Enum.Material.Ground then
				MaterialAllowed = true
			end
		end
		
		local Pos
		if Hit then
			if BuildPositionLocking[BuildingItem.Name] and Hit:HasTag(BuildPositionLocking[BuildingItem.Name]) then
				LockedItem = Hit
				Pos = Hit.CFrame
			else
				LockedItem = nil
				Pos = CFrame.new(
					Vector3.new(
						math.ceil(Position.X/GridSizes[CurrentGridSize])*GridSizes[CurrentGridSize],
						math.ceil(Position.Y),
						math.ceil(Position.Z/GridSizes[CurrentGridSize])*GridSizes[CurrentGridSize])
				)*CFrame.Angles(0,math.rad(CurrentRoation),0)
			end
			
			BuildingItem:PivotTo(Pos)
			print(BuildingItem,BuildingItem:GetDescendants(),BuildingItem.PrimaryPart)
			local PrimaryPart = BuildingItem.PrimaryPart

			local PrimaryPartPos = PrimaryPart.Position
			local DownRaycastResult = workspace:Raycast(PrimaryPartPos, Vector3.new(0, -1, 0) * 2, Params)
			local DownHit = DownRaycastResult and DownRaycastResult.Instance
			local DownHitPos = DownRaycastResult and DownRaycastResult.Position

			local InsideRayOrigin = PrimaryPartPos - Vector3.new(0, 2.5, 0)
			local UpRaycastResult = workspace:Raycast(InsideRayOrigin, Vector3.new(0, 1, 0) * 2.5, Params)
			local UpHit = UpRaycastResult and UpRaycastResult.Instance
			local UpHitPos = UpRaycastResult and UpRaycastResult.Position

			if (PrimaryPartPos-Character.HumanoidRootPart.Position).Magnitude >= MaxPlacingDistance then--Part is too far away
				GoodToPlace = false
				for i,v in BuildingItem.Structure:GetChildren() do
					v.Color = Color3.new(1, 0.54902, 0)
				end
			elseif (DownHit or UpHit) and (not TerrainParams or MaterialAllowed) then
				GoodToPlace = true
				for i,v in BuildingItem.Structure:GetChildren() do
					v.Color = Color3.new(0.101961, 1, 0)
				end
			else
				GoodToPlace = false
				for i,v in BuildingItem.Structure:GetChildren() do
					v.Color = Color3.new(1, 0, 0)
				end
			end
		end
		
		
		
		wait()
	end)
end

print(BuildingItem,BuildingItem:GetDescendants(),BuildingItem.PrimaryPart) prints “FarmlandSquare, {}, nil” meaning somewhere along the way the famland lost all its descendants. Why does this happen?

If this is useful information, this issue didn’t happen until I moved the code in HoeEvents() into a function. it used to just be contained in this:

for i, Hoe in CollectionService:GetTagged("Hoe") do
...
end 

But I change it into a function so I could have that code run for current and existing hoes

for i, Hoe in CollectionService:GetTagged("Hoe") do
	HoeEvents(Hoe)
end 

CollectionService:GetInstanceAddedSignal("Hoe"):Connect(function(Hoe)
	HoeEvents(Hoe)
end)

Once I did this is when the problem came about.