Part with meshpart inside can't change position

[DyWast (DyDuck)]

I am working on a system that lets you buy and pick up blocks from a conveyor belt, the problem is that a block just don’t want to be where i want it to be.

How it should look, and looks with the other blocks:

What happens with another block:

I’ve diagnosed the problem to the Halo, which is a meshpart. I don’t know why this is happening, nothing is anchored and everything is massless, and I’ve tried with every weld.

Here’s also the modulescript if needed

local HoldBlockModule = {}

function HoldBlockModule.HoldBlock(Player, BlockValue, Mutation)
	local ReplicatedStorage = game:GetService("ReplicatedStorage")
	
	local character = Player.Character
	local BlockPos = character.HumanoidRootPart.CFrame * CFrame.new(0, 0, -3)
	
	local Block = ReplicatedStorage.Mutations:FindFirstChild(Mutation):Clone()
	Block.Parent = character
	Block.CFrame = BlockPos
	Block.Anchored = false
	Block.Massless = true
	
	local Weld = Instance.new("WeldConstraint")
	Weld.Parent = Block
	Weld.Part0 = Block
	Weld.Part1 = character.HumanoidRootPart
	
end

return HoldBlockModule

[Grimm2Day (Grim)]

This seems odd…it certainly seems like it should be behaving the same way the Normal Block would.
What lead you to the halo part causing the issue? I’m thinking there’s a discrepancy between the pivot point on the Holy Block and the Normal Block?

[DyWast (DyDuck)]

I solved it, the problem was that the Halo somehow got the role as the rootpart. I fixed it by changing the root priority to 1 on the main block.