Parts is moving player that it is welded to when resized?

Okey Dokey So I have a thing that makes a bubble around the players mouth and everytime the blow it gets bigger. But like when its around 7 studs wide or 150 as the variable size the player gets pushed back everytime the bubble is blown. I feel like it has something to do with how when roblox resizes something it moves it out of any collisions but ive tried to fix that by when resizing it I first make its parent server storage then resize it then move it back into the character (in workspace) the resizing function is at line 49 Here is the script:

local Part = script.Bubble
local Size = .1
local Db = true
local BlowTime = 20
local Character = script.Parent
local Player = game:GetService("Players"):GetPlayerFromCharacter(Character)
local BubbleSize = Player:WaitForChild("leaderstats"):WaitForChild("BubblePower")
local SizeIncrease = .05
BubbleWeld = nil
function UpdateWeld()
	if BubbleWeld then
	BubbleWeld:Destroy()
	end
	-- oh roblox physics
	Part.Parent = nil
	Part.Size = Vector3.new(Size,Size,Size)
	Part.Anchored = false
	Part.CanCollide = false
	local Distance = Character.Head.Size.Z/2 + Size/2 + .05 -- got to account for the mesh stuff and shet
	BubbleWeld = Instance.new("Weld")
	BubbleWeld.Parent = Part
	BubbleWeld.Part0 = Character.Head
	BubbleWeld.Part1 = Part
	BubbleWeld.C1 = CFrame.new(0,0,0)
	BubbleWeld.C1 = CFrame.new(0,.27,Distance)
	Part.Parent = workspace
end

function BlowBubble(plyr)
	if plyr ==  Player then	
		if Db then
			Db = false
			Size = 0.1
			UpdateWeld()
			Part.Transparency = 0.1
			Part.Blow:Play()
			local ActualSize = .01 + BubbleSize.Value * SizeIncrease
			local Increase = ActualSize/BlowTime
			for i = 1,BlowTime do
				wait(.1)
				Size = Size + Increase
				UpdateWeld()
			end
			wait(.3)
			Part.Pop:Play()
			Part.PopParticle.Enabled = true
			UpdateWeld()
			Part.Transparency = 1
			BubbleSize.Value = BubbleSize.Value + 1
			Size = .1
			UpdateWeld()
			wait(.1)
			Part.PopParticle.Enabled = false
			Db = true
		end
	end
end
Part.Parent = workspace
Part.Transparency = 1
UpdateWeld()
Player:WaitForChild("BlowBubbleEvent").OnServerEvent:connect(BlowBubble)
local EquippedFlavor = Player:WaitForChild("Flavor")
function ApplyFlavor()
	print("Applying Flavor")
	wait(.05)
	Part.Color = EquippedFlavor.Color.Value
	Part.PopParticle.Color = ColorSequence.new(EquippedFlavor.Color.Value) -- this is sorta dumb
end
EquippedFlavor.Changed:connect(ApplyFlavor)
ApplyFlavor()