allWindows() cannot get all of my finder windows

[PaRr0tBoY]

Function of this script

This script monitors the number of active Finder windows. Upon detecting two or more windows, it executes the ⌘U shortcut to consolidate them.

What I try to solve

However, as Aerospace segregates windows into distinct virtual workspaces, the script invokes an Aerospace command to migrate all non-focused windows to the currently active virtual workspace whenever a new window is generated.

Bug

A flaw in the implementation intermittently prevents certain windows from successfully relocating to the designated workspace.
In the console I see hs.application:allWindows() only returned the newest Finder window and the last created windows(That is 2 windows) even when I have 4 to 5 finder windows.

Fix Attempt

Attempt 1: Added delay before workspace migration → ==no dice==
Attempt 2: Reversed sequence:
  - Option A: Aerospace move then ⌘U
  - Option B: ⌘U then Aerospace move
==Both paths lead to failville==.

==Code==

local wf = hs.window.filter.new(false):setAppFilter('Finder')

local function sh_quote(s)
    return "'" .. tostring(s):gsub("'", "'\\''") .. "'"
end

wf:subscribe(hs.window.filter.windowCreated, function(window, appName, eventName)
    local app = hs.application.find(appName)
    if not app then return end

    local windows = app:allWindows()
      for _, n in pairs(windows) do
        print(string.format("finder windows: %s (ID: %d)", n:title(), n:id()))
      end

    -- The loop prints
    -- 2025-09-14 12:47:58: finder windows: /Users/acid/Downloads/UniDL (ID: 32953)
    -- 2025-09-14 12:47:58: finder windows: /Users/acid/Downloads/UniDL (ID: 32931)
    -- 2025-09-14 12:47:58: finder windows:  (ID: 0)
    -- I create one Finder window in each virtual workspace (aerospace) and check if they're sent to the most recently focused workspace.
    -- Looks like allWindows only captures the newest Finder window and the last created windows each time windowCreated was triggered.
    -- Any idea what's causing this? How can I solve it?

    if #windows >= 2 then
        hs.eventtap.keyStroke({"cmd"}, "u", app) --I use cmd u to group all finder windows
    end

    local raw = hs.execute("aerospace list-workspaces --focused", true) or ""
    local workSpaceName = raw:match("([^\r\n]+)") or ""
    workSpaceName = workSpaceName:match("^%s*(.-)%s*$") or ""

    if workSpaceName == "" then
        hs.alert.show("Unable to fetch current workspace")
        return
    end

    for _, win in ipairs(windows) do
        local wid = tostring(win:id())
        if wid and wid ~= 0 then
            local cmd = string.format("aerospace move-node-to-workspace --window-id %s %s", wid, sh_quote(workSpaceName))
            hs.execute(cmd, true)
        end
    end
end)

[avegetablechicken]

It seems that windows in workspaces that have not been activated since Hammerspoon was launching may not be fetched by allWindows.