I am facing a strange issue where my UDP socket that was earlier bound to a port is not unbinding from the port when I call closesocket(). The API call doesn't return any error but netstat command and TCPView app still show that port is still in use by my application.

My application is a COM server and socket creation happens on one thread, binding closing happens on different thread, reading on a third thread.

So far tried creating the socket, binding, reading and closing on the same thread but still seeing the issue.