Can`t receive upnp notify when i turn on system hotspot in windows11,but in windows10 it`s worked

[Windows Server]

In windows 11 ,I start a console application which i can receive upnp message to know what device is in my net,but when i turn on my system hotspot ,I cant receive upnp broadcast message. this would not happen in window10. I want to know: First: What`s the different between win10 and win11 in systemhotspot Second: What cause this problem,and how can i fix this

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