https://bugs.winehq.org/show_bug.cgi?id=46940
--- Comment #8 from Lectrode electrodexsnet@gmail.com --- Yes, I tested this functionality a few days ago.
Just tested again with the latest Proton (5.0): -With the workaround (commenting out 127.0.1.1 in hosts file): still works as expected -Without the workaround: does not work
With the workaround in place, GTA 5 continues to detect the local IP as 127.0.0.1, which works. It's only when it detects it as 127.0.1.1 that it doesn't.