GUIs keep flashing and selection box sticking? (Coroutine based, difficult, unsolved)

Alright, so, you might have seen my previous question, but I've been working on it heavily and it has now evolved. However, this time, the GUIs are flashing, and if I move my mouse too fast, the selection boxes stick, and will randomly shut off if I touch something else (meaning it won't always shut off when supposed to)

I've found that whenever I let the game sit for about 3 seconds, then try to mouse over the blocks to show the selection boxes, they never stick, no matter how fast I move the mouse. If the selection boxes aren't sticking, then the GUIs don't flash if the mouse is moving fast. If the mouse is moving slowly, they will flash.

The code is now much more advanced and may be more difficult to help solve. Here's the code --

local mouse = game.Players.LocalPlayer:GetMouse()
local debounce = false
local debounce1 = false
local debounce2 = false
local debounce3 = false
local maintarg 
local selection
local moving = false
local debounceI = false

-- The next 3 functions are called upon in the second to last function, and don't need to be read right away.

function Empty(target)
    if not debounce1 then
        debounce1 = true
        local EmptyC = coroutine.create(function()
            local selectionBox = Instance.new("SelectionBox", target) 
            selectionBox.Adornee = target 
            selectionBox.Color = BrickColor.new("Really red")
            repeat wait() until maintarg ~= target and moving == true
            selectionBox:Destroy()
        end)
        coroutine.resume(EmptyC)
        debounce1 = false
    end
end

function Storage(target)
    if not debounce2 then
        debounce2 = true
        local StorageC = coroutine.create(function()
            target:FindFirstChild("InfoStorage", true).Enabled = true
            local selectionBox = Instance.new("SelectionBox",target) 
            selectionBox.Adornee = target 
            selectionBox.Color = BrickColor.new("Bright orange")
            repeat wait() until maintarg ~= target and moving == true
            target:FindFirstChild("InfoStorage", true).Enabled = false
            selectionBox:Destroy()
        end)
        coroutine.resume(StorageC)
        debounce2 = false
    end
end

function Housing(target)
    if not debounce3 then
        debounce3 = true
        local HousingC = coroutine.create(function()
            target:FindFirstChild("InfoHousing", true).Enabled = true
            local selectionBox = Instance.new("SelectionBox",target)
            selectionBox.Adornee = target 
            selectionBox.Color = BrickColor.new("Lime green")
            repeat wait() until maintarg ~= target and moving == true
            target:FindFirstChild("InfoHousing", true).Enabled = false
            selectionBox:Destroy()
        end)
        coroutine.resume(HousingC)
        debounce3 = false
    end
end

-- Main function below!

mouse.Move:connect(function()
    moving = true
    if not debounce then
        debounce = true
        if mouse.Target ~= nil then
            local maintarget = mouse.Target.Parent.Parent
            if mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type0") then -- second mouse.Target is to make sure it's not a skybox.
                Empty(mouse.Target.Parent.Parent);

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type1") then
                Storage(mouse.Target.Parent.Parent);

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type2") then
                Housing(mouse.Target.Parent.Parent);

            else
                maintarg = "Nil"
            end
        end
        debounce = false
    end
end);

mouse.Idle:connect(function()
    if not debounceI then
        debounceI = true
        moving = false
        debounceI = false
    end
end)

The selection boxes keep sticking on me (meaning they aren't destroyed). Sometimes they will disappear, but usually they'll stick. The Gui, however, goes away most of the time.

Thanks for reading, and I appreciate anybody who is helping with this!

EDIT: Well, the first sticking issue was because I put the debounce# = false after the wrong end. However, the GUIs are now flashing, even when the selection boxes aren't. And, the selection boxes still stick when moving too fast.