https://bugs.winehq.org/show_bug.cgi?id=51401
--- Comment #2 from winebugs@evolution-hosting.eu winebugs@evolution-hosting.eu ---
6.12 sends 3 SYNs with 3 session ids, instead of just one SYN paket.
You can see the server reply SYN-ACK for all 3 SYN pakets comming in, but the stack things, that the first session id (in this case 831085749 ) is wrong, as the last SYN ID the stack sent, was 831085751.
The stack now resets the connections and that's it => complete fail.