Very strange behaviour with Region3

I have made a system that should dig a hole where the player clicks but the scale seems to be off or something.
robloxapp-20210411-0951248.wmv (3.7 MB)

Here is my code

Local script:

local uis = game:GetService("UserInputService")
local mosue = game.Players.LocalPlayer:GetMouse()
local camera = game.Workspace.CurrentCamera
local player = game.Players.LocalPlayer
local params = RaycastParams.new()
params.FilterDescendantsInstances = {game.Workspace.Terrain}
params.FilterType = Enum.RaycastFilterType.Whitelist

uis.InputBegan:Connect(function(input,gp)
	if not gp then
		if input.UserInputType == Enum.UserInputType.MouseButton1 then
			local mouseHitDirection = mosue.Hit.lookVector
			local hit = game.Workspace:Raycast(game.Workspace.CurrentCamera.CFrame.Position,mouseHitDirection*50,params)
			if hit then
				game.ReplicatedStorage.Dig:FireServer(hit.Position)
			end
		end
	end
end)

Server Script:

game.ReplicatedStorage.Dig.OnServerEvent:Connect(function(plr,hit)
	local part = Instance.new("Part")
	part.Anchored = true
	part.Position = hit
	part.Parent = game.Workspace
	part.Transparency = 0.5
	part.CanCollide = false
	terrainChange(hit-(digsize/2),hit+(digsize/2),Enum.Material.Air,true)
end)

Terrain Change function, the “actualdata” are just the X, Y, and Z from the first two arguments in terrainChange()

local region = Region3.new(Vector3.new(actualdata[1],actualdata[2],actualdata[3]),Vector3.new(actualdata[4],actualdata[5],actualdata[6]))
game.Workspace.Terrain:FillRegion(region ,1,Enum.Material.Air)

Resolution (the second argument for FillRegion) needed to be 4