UDP socket not unbinding from a port

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C++

Windows

COM

multi-threading

, +

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.

What I have tried:

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