How to make Wrangler kill Webpack dev server?

[StrandedKitty]

I'm starting Wrangler with wrangler pages dev --port 8776 --compatibility-flags="nodejs_compat" -- npm start, and npm start is an alias for webpack serve --config ./webpack.config.js --mode=development, which starts a webpack dev server.

The problem with this setup is that Webpack still continues to run and occupies a port even when I kill Wrangler (Ctrl+C or by pressing x) or when Wrangler crashes. This is really annoying, and I have no idea how to free the port besides restarting the machine. Is there a way to automatically kill Webpack?