Usage of System.IProgress/Progress with Spectre.Console.AnsiConsole.Progress

[Gigas002]

After reading corresponding question in discussions and writing my own example I came up with multiple questions, regarding usage of System.IProgress/System.Progress with Spectre.Console.AnsiConsole.Progress.
Here's my code sample:

var iterationCount = 10000.0;
ProgressTask pt = null;
IProgress<double> progress = new Progress<double>(d =>
{
    // pt.Value = d;
    // pt.Increment(0);

    pt.Increment(1);
});

bool readyToStart = false;

var ansiProgressTask = AnsiConsole.Progress().StartAsync(async ctx =>
{
    await Task.Run(() =>
    {
        // Add correct reference to ProgressTask
        pt = ctx.AddTask("Test IProgress", true, iterationCount);
        readyToStart = true;

        while (!ctx.IsFinished) { }
    });
});

var someWork = Task.Run(async () =>
{
    // Wait for ProgressTask to be set
    while (!readyToStart) { }

    for (int i = 0; i <= iterationCount; i++)
    {
        double percentage = i / iterationCount * 100.0;
        await Task.Delay(1);
        progress.Report(percentage);
    }
});

await Task.WhenAll(someWork, ansiProgressTask);

The first problem I've experienced was StartAsync blocking, but this problem is already described in #680, so I won't talk about it here further.
The second problem is the need to re-create ProgressTask in AnsiConsole.Progress().StartAsync(...) delegate with ProgressContext.AddTask() method. IMO, it would be great to have an overload for ProgressContext.AddTask() method, that takes ProgressTask as argument and returns void, so we don't need to create a new ProgressTask and wait for it's initialization in working thread (e.g. someWork task here).
And the third problem is that I usually use IProgress.Report() method, which takes percentage, not just ticks, and prints progress to console like this:

IProgress<double> progressToConsole = new Progress<double>(Console.WriteLine);

that's because I usually don't know which iterationCount will be in my tasks before I run them. But setting ProgressTask.Value property doesn't update the displayed progress. I also tried to call ProgressTask.Increment(0); after changing the Value but it takes no effect. I don't know the best solution for this problem, probably something like INotifyPropertyChanged can be used for Value property, or there's a better, completely different solution?