FlaUI doesn't get all descendents accessible in Inspect

[peerpalo]

Describe the bug
In CalculatorApp FlaUI doesn't get all descendents of CalculatorResults element, which are visible in Inspect.exe

Code snippets

using FlaUI.Core.AutomationElements;
using FlaUI.UIA3;

var automation = new UIA3Automation();
var application = automation.FromHandle(987676); // use CalculatorApp NativeWindowHandle
var window = application.AsWindow();
var text = window.FindAllDescendants().Where(d => d.Properties.AutomationId.IsSupported).SingleOrDefault(d => d.AutomationId == "CalculatorResults");
var allDescendants = text!.FindAllDescendants();

Console.WriteLine($"{text.AutomationId} has {allDescendants.Length} descendants");
Console.ReadLine();

Screenshots

FlaUI

Inspect

Additional context
As you can see in Inspect screenshot inside CalculatorResults Text element there is another Pane which has another Text element. I've tried to dig inside FindAllDescendants method but it's basically a straightforward proxy to UI Automation FindAll. Trying also to access directly with its own AutomationId (NormalOutput) returns null.

[aristotelos]

I have experienced a problem with FindAll too that it not always traverses the whole tree.

A workaround for me was to first get a direct child, then get the descendant of that child (so stepping through the tree one child after another).

I tried logging an issue via the Feedback Hub Microsoft app: https://aka.ms/AAnqw26. If there is any other way of raising this (e.g. is there a GitHub project for UI Automation 3?) then let me know!