Qt 5.4 QTcpSocket failure in WinRT with QNativeSocketEnginePrivate::nativeConnect:: Could not obtain connect action

justinr1234

I'm attempting to recompile an existing Qt 5.3 project with the latest Qt 5.4 beta (http://download.qt-project.org/development_releases/qt/5.4/5.4.0-beta/qt-opensource-windows-x86-winrt-5.4.0-beta.exe).
My current program is running flawlessly on the following platforms: ios (ipad & iphone both), mac, linux, windows, android.
Main UI runs fine but I get the failure on trying to use QTcpSocket
I have not tried this on Qt 5.3. This is only Qt 5.4. I have never run my program on Qt 5.3.

My code looks like this:
@
QTcpSocket->connectToHost(server, port, ReadWrite, IPv4Protocol);
QTcpSocket->waitForConnected(30000);
@

The call to connectToHost, when running my project in debug mode on WinRT, has some debug output which looks fishy:
HEAP[WinPCSQt.exe]: HEAP: Free Heap block 000000902D4DC260 modified at 000000902D4DC2C8 after it was freed
qt.winrtrunner.app: QNativeSocketEnginePrivate::nativeConnect:: Could not obtain connect action
QNativeSocketEnginePrivate::nativeConnect:: Could not obtain connect action
qt.winrtrunner.app: QNativeSocketEnginePrivate::nativeConnect:: Could not obtain connect action
QNativeSocketEnginePrivate::nativeConnect:: Could not obtain connect action

Running without the debugger, compiled with Release Profile, I get this message from winrtrunner on start: qt.winrtrunner.app: Unable to bind socket. (Access is denied.)

When I call waitForConnected I get an immediate return of false. Two conditions:

Running without the debugger, but compiled with the Debug Profile: error() returns 0
Running WITH the debugger, compiled in Debug Profile: error() returns -1

What I have tried:

I have verified that the connection works perfectly on all other OSes (even at the exact same time as trying on WinRT).
I have verified that it runs perfectly on the SAME MACHINE as a regular Windows desktop app
I have disabled the Windows firewall completely for all network types (public & private)
I have modified my deployment information for QMAKE with no luck (see below the winrt { config). This also doesn't actually generate any capabilities in the appxmanifest.xml.
I have modified the AppxManifest.xml directly and added capabilities for "internetClientServer" and "privateNetworkClientServer" (see below)
I have verified I'm modifying the correct AppxManifest.xml ... if I try to run the app from QtCreator with a malformed file, it complains that the file is invalid

WinRT info on app manifest and capbilities:

"How to set network capabilities (HTML)":http://msdn.microsoft.com/en-us/library/windows/apps/hh770532.aspx
"App capability declarations (Windows Runtime apps)":http://msdn.microsoft.com/en-us/library/windows/apps/hh464936.aspx
"How to specify capabilities in a package manifest":http://msdn.microsoft.com/en-us/library/windows/apps/br211477.aspx

@
winrt {
winphone:equals(WINSDK_VER, 8.0) {
WINRT_MANIFEST.capabilities += ID_CAP_NETWORKING
} else {
WINRT_MANIFEST.capabilities += internetClient
}

CONFIG += windeployqt

}
@

@
<Capabilities>
<Capability Name="internetClientServer"></Capability>
<Capability Name="privateNetworkClientServer"></Capability>
</Capabilities>
@