Console.GetCursorPosition behaves oddly with multiple threads on WSL

Description

According to https://github.com/dotnet/runtime/blob/6406b578b43646b0b1d348da00a32d2f61860cf7/src/libraries/System.Console/src/System/ConsolePal.Unix.cs#L455C1-L460C31, a call to Console.GetCursorPosition from thread B can/will be blocked until a call to Console.ReadLine in thread A completes.
However, when calling Console.GetCursorPosition at least twice in the same iteration of a for loop in which thread A also calls Console.ReadLine, this behavior no longer occurs and from then on B is able to call Console.GetCursorPosition without being blocked.

Reproduction Steps

Create a new console project, targeting .NET 8 or .NET 9.
Run the following:

static void Main(string[] args)
{
    Task.Run(() =>
    {
        while (true)
        {
            Console.WriteLine($"CursorPosition = {Console.GetCursorPosition()}");
            Thread.Sleep(1000);
        }
    });

    for (int i = 0; i < 10; i++)
    {
        string? input = Console.ReadLine();

        if (i == 2)
        {
            Console.GetCursorPosition();
            Console.GetCursorPosition();
        }
    }
}

Expected behavior

"CursorPosition = ..." should be printed every second, or remain blocked until the calls to Console.ReadLine() complete.

Actual behavior

In each iteration of the loop, nothing is printed until a string is read from Console.ReadLine(). However, once Console.GetCursorPosition() is called twice in the same iteration of the loop, the "CursorPosition = ..." line is printed every second as expected.

For example, CursorPosition = ... is only outputted after a new line is inputted, but after the GetCursorPosition lines are executed, the output continues without anything having been entered:

the
CursorPosition = (0, 2)
quick
CursorPosition = (0, 4)
brown
CursorPosition = (0, 6)
CursorPosition = (0, 7)
CursorPosition = (0, 8)
CursorPosition = (0, 9)

Moving one of the GetCursorPosition calls before the Console.ReadLine produces the same result as when both calls are done after the Console.ReadLine:

for (int i = 0; i < 10; i++)
{
    Console.GetCursorPosition();
    string? input = Console.ReadLine();
    if (i == 2)
        Console.GetCursorPosition();
}

Note the i == 2 can be any number (and the loop max is irrelevant), this is only to show behavior is consistent before GetCursorPosition is called a second time.

Regression?

No response

Known Workarounds

No response

Configuration

Occurs in both .NET 8.0.403 and 9.0.100-preview.7.24407.12
Running Ubuntu 22.04 via WSL2 on Windows 11.
Same behavior in debug and release builds
Outside of WSL, the task outputs every second as expected on both .NET versions.

Other information

No response

dotnet / runtime