Minimserver behaving abnormally

[Peter StreamMagic]

TP Link engineer helped me yesterday looking in detail their router specs but still did not find anythg that can solve the problem.

A TP Link engineer should know this but you can have a try ........
Found this on the trouble shooting page from TP Link:

What should I do if my UPnP-enabled device isn't working?
• Check Device Compatibility: Ensure the device supports UPnP.
• Restart Devices: Restart both your router and the UPnP-enabled device.
• For some TP-Link models, UPnP is disabled by default for security reasons. If you need it, make sure UPnP is enabled in your router settings.
• Check Firewall Settings: Make sure that your firewall isn't blocking UPnP traffic.