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CC2564: Windows can't detect Serial Port service using ISPP profile

Part Number: CC2564

I'm running into an issue in my program that I can reproduce with the ISPP Demo example.

My system acts as a serial port Server and I can connect to it from an Android device, iOS device and macOS computer. However, the service can't be detected from Windows.

If I run the SPP Demo, everything works. The COM ports are created automatically when pairing the device (incoming and outgoing).
But when I run the ISPP Demo, the COM ports are not created. If I try to add them manually in Bluetooth Settings > COM Ports, I get the following error message:
"The device that you have selected does not have a serial port service running."

For reference, I'm using Windows 10 version 1803 (OS Build 17134.48) and a Belkin USB-Bluetooth adapter, based on a Broadcom chip, which uses the native Windows Bluetooth stack.

I'm not sure if the problem is in the app (ISPP Demo) or in TI/Windows Bluetooth stack.

What can I do to further investigate the issue?