Problems finding the closest UI element to the mouse

Help and Feedback Platform Usage Support
#1

My goal is to write code that accurately grabs the closest UI frame to the mouse position, but with one specific area of the UI it grabs the element which is 1-2 objects away from the actual closest.

My code so far:

local function isNumeric(str)
					for i = 1, #str do
						local char = str:sub(i, i)
						if char < '0' or char > '9' then
							return false
						end
					end
					return true
				end

local UIS = game:GetService("UserInputService")
				local mousePos = UIS:GetMouseLocation()
				local closestImageButton = nil
				local closestDistance = math.huge
				for _, object in v.Parent:GetChildren() do 
					if object:IsA("ImageButton") and isNumeric(object.Name) then
						local imgBtnCenter = object.AbsolutePosition + 0.5 * object.AbsoluteSize
						local distance = (mousePos - imgBtnCenter).Magnitude
						if distance < closestDistance then
							closestImageButton = object
							closestDistance = distance
						end
					end
				end
				if closestImageButton then
					Released = closestImageButton
					print(closestImageButton.Name)
				end

v.Parent = container of all UI elements
all elements are numbered (1-30)

UI Structure:
Image Label (Parent)
----InputFrame
--------ui list layout
--------1
--------2
--------3
--------4
— 5
—MainSlots
-------UIgridlayout
------- 6
------- 7
--------8
etc

a problem arises when I hover my mouse over the MainSlots Frame,
when I put my mouse over slot 6, it detects the closest as slot13 when
in reality the closest is slot 6.

Any help would be appreciated, thanks!