Old process data is displayed, and refresh doesn't work

[charl1e7]

I'm unable to properly track the status of a program. If the program exits, its last data remains displayed, and calling refresh does not work. Only reinitializing the System instance resolves the issue(Well, almost).

Here's an example code snippet to demonstrate the issue:

// [dependencies]
// sysinfo = "0.33.1"
use sysinfo::{Pid, System};
use std::env;
use std::thread;
use std::time::Duration;

fn main() {
    let args: Vec<String> = env::args().collect();
    if args.len() != 2 {
        println!("Usage: {} <pid>", args[0]);
        return;
    }

    let pid = match args[1].parse::<u32>() {
        Ok(pid) => pid as usize,
        Err(_) => {
            println!("Invalid PID format");
            return;
        }
    };

    let mut system_refresh = System::new();
    println!("Starting process monitoring...\n");
    
    loop {
        print!("Refresh method: ");
        system_refresh.refresh_all();
        match system_refresh.process(Pid::from(pid)) {
            Some(process) => println!("Status: {:?}", process.status()),
            None => println!("Status: Not Found"),
        }

        print!("New instance: ");
        let mut system_new = System::new();
        system_new.refresh_all();
        match system_new.process(Pid::from(pid)) {
            Some(process) => println!("Status: {:?}", process.status()),
            None => println!("Status: Not Found"),
        }

        println!("----------------------------------------");
        thread::sleep(Duration::from_secs(2));
    }
}

And as can be seen in the image, the new initialization correctly detects that the process is no longer running(not found), while refresh still considers the program to be Run.
I would like the process status to be tracked correctly.And I think my question aligns with this.