OSC sequences flushed asynchronously

[cpendery]

I thought enabling the new useConptyDll feature in node-pty@1.1.0-beta27 would cause all OSC sequences to be synchronously emitted, but I'm still seeing them get emitted before the content they surround. Is there another setting I need to enable for this behavior?

Example:

var os = require("os");
var fs = require("fs");
var pty = require("node-pty");

var shell = os.platform() === "win32" ? "pwsh.exe" : "bash";

var ptyProcess = pty.spawn(shell, [], {
  name: "xterm-color",
  cols: 80,
  rows: 30,
  cwd: process.env.HOME,
  env: process.env,
  useConpty: true,
  useConptyDll: true,
});

ptyProcess.onData((data) => {
  fs.appendFileSync("output.txt", data + "\n");
});

ptyProcess.write('echo "$([char]0x1b)]6973;START`a12$([char]0x1b)]6973;END`a"\r');

Output:

�[?25l
�[93mecho �[36m"�[37m$([char]�[97m0x1b�[37m)�[36m]6973;START`a12�[37m$([char]�[97m0x1b�[37m)�[36m]6973;END`a"
�[?25h
�]6973;START��]6973;END�
�[m12