Unexpected output in java console

Question

I'm confused with the console output in these little pieces of code:

public static void main(String[] args) throws Exception {
    String path = "/hi/my/path";
    System.out.println(path);
    System.err.println("ERROR!!!");
}

I would expect output in a linear way:

/hi/my/path
ERROR!!!

But I'm getting:

I also tried with flush() as in the possible duplicate:

public static void main(String[] args) throws Exception {
    String path = "/hi/my/path";
    System.out.println(path);
    System.out.flush();
    System.err.println("ERROR!!!");
    System.err.flush();
}

But that gets:

And if I run:

public static void main(String[] args) throws Exception {
    String path = "/hi/my/path";
    System.out.println(path);
    System.err.println(path);
    System.out.println("ERROR!!!");
    System.err.println("ERROR!!!");
}

I get:

And even stranger, if I execute this:

public static void main(String[] args) throws Exception {
    String path = "/hi/my/path";
    System.out.println(path);
    System.out.flush();
    System.err.println(path);
    System.err.flush();
    System.out.println("ERROR");
    System.out.flush();
    System.err.println("ERROR!!!");
    System.err.flush();
}

I get:

Is there something I'm missing? When I debug it, everything goes in a linear way and the output is the expected output, but not when I run the program normally.

Is there a higher priority for the err output stream relative to out? Is System.err faster than System.out for something?

Looking at the System source code, err and out are both PrintStream.

Any idea why is this happening?