Why Flutter Socket.connect does not work if network is changed after app startup

Question

When using the Socket.connect from dart:io package, I can successfully connect to an ip:port that is serving an app in NETWORK A.

The problem:

If I am not in that specific network (NETWORK A) when the app starts, and instead I connect to it after app start (change the wifi from NETWORK B to NETWORK A), then the Socket connection fails.

Code Example:

Socket.connect(host, port, timeout: timeout).then((socket) {
  print("Success!");
}).onError((e) => print("Failure"));

Env:

• Flutter 3.16.5
• Dart 3.2.3
• DevTools 2.28.4