ANSI color is not retained across multiple `print(ln)!`'s in Windows legacy console

Cargo.toml

[package]
name = "anstream-test"
version = "0.1.0"
edition = "2021"

[dependencies]
anstream = "0.6.18"

src/main.rs

use anstream::{print, println};

fn main() {
    print!("\x1b[90m(print!) This text is displayed in gray.\n");
    print!("(print!) This text should also be displayed in gray.\n");
    println!("\x1b[90m(println!) This text is displayed in gray.");
    println!("(println!) This text should also be displayed in gray.\x1b[0m");
}

Steps to reproduce

Run cargo run in CMD/PowerShell with 'Legacy Console mode' enabled.

Expected result

All the lines should be displayed in gray, just like in the non-legacy Windows Console.

Actual result

Only the lines that output \x1b[90m are displayed in gray (1st and 3rd lines).

Environment

• Windows 10 22H2 Home x64 10.0.19045.5011
• Visual Studio Community 2022 17.11.5 / Windows 11 SDK 10.0.26100.0
• Default host: x86_64-pc-windows-msvc
• Active toolchain: stable-x86_64-pc-windows-msvc (default) / rustc 1.82.0 (f6e511eec 2024-10-15)

Begin with the Cargo.toml and src/main.rs reproduction on Windows with Legacy Console mode enabled, then trace anstream's handling of ANSI output for that console. Done means the reproduced print! and println! lines retain gray coloring across successive calls, while behavior in the non-legacy console remains correct.