watchpack: Watch Fails on versions > 1.6.1

Hi,

I recently discovered my webpack watch had stopped working after reinstalling node modules. After a lot of digging i pinned the issue down to this package. Basically when i use any other version of this package > 1.6.1 the watcher does not keep the process alive anymore. There is no error in the console but the process.on('exit', handler fires.

I am using webpacks node api as follows:

var compiler = webpack(params);

  if (watch) {
    compiler.watch({
      ignored: /node_modules/
    }, onBuildComplete);
  }
  else {
    compiler.run(onBuildComplete)
  }

I thought it was only me but many of my team mates are experiencing the same thing.

We are watching quite a lot of files (> 800) which might be a contributing factor.

node: 10.21.0 npm: 6.1.0 webpack: 4.43.0 Windows 10 Enterprise