[Bug 50955] New: .netCore app can't bind to port shortly after another .netCore program binding to the same port was terminated

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50955

            Bug ID: 50955
           Summary: .netCore app can't bind to port shortly after another
                    .netCore program binding to the same port was
                    terminated
           Product: Wine
           Version: 6.5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: besentv at gmail.com
      Distribution: ---

Created attachment 69784
  --> https://bugs.winehq.org/attachment.cgi?id=69784
BrokenClient

I provided code for 3 different programs as attachment which represent
extremely scaled down code of a bug I tried to find in a proprietary program:

BrokenServer and BrokenClient are both C# programs created for .netCore 3.1
(x86).

BrokenServer creates a socket, tries to bind it to port 41811 and ends up
accepting all incoming connections on this port inside an infinite loop. 

Broken Client tries to connect to the socked opened by BrokenServer and ends up
in an infinite loop(seems important!?). 

TestCode is to test what is actually broken in Wine: It runs a BrokenServer and
3 BrokenClients using CreateProcessA() and waits for getchar(). After that it
stops all 4 processes using TerminateProcess() and immediately restarts the
BrokenServer using CreateProcessA(). The server tries to bind to port 41811 but
unlike on Windows it (almost) always fails to do so, showing a MessageBox with
the information that the port is already in use.

As mentioned before, the infinite loop in BrokenClient seems to make a
difference because I never encountered this issue without it. 
I wasn't able to recreate this problem with native code.
Everything was tested in a clean prefix with .netCore x86 desktop
("windowsdesktop-runtime-3.1.10-win-x86") installed.

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