PORT number changes from VSCode terminal (by exactly +1)

1. Open VSCode
2. Run a web server in WSL, be it Express.js binded to port 8080, parcel-bundler to port 1234, Nuxt to port 3000, it doesn't matter.
3. console.log('http://localhost:${PORT}')
4. Click the link in VSCode terminal
5. Port number in MS Edge increases by one to 8081, 1235, 3001, respectively.
6. Some web apps' hyperlinks break.
   • go-swagger gin
   • Nuxt in history mode