Strange networking issue possibly regarding Windows 10

[AdamN]

There are Win10 updates recently while adhoc haven't been updated for... months may be (i don't even remembered when was the last PR), so if newer OS updates is starting to get this issue.. may be it's the correct socket's binding behavior that got fixed recently by OS devs, but i haven't found any documentation how to trigger this (may be PPSSPP's netcode accidentally triggering this for a long time but because not many OS fixed it it somehow worked fine in the past)

Also, the only reason you won't be seeing this "incorrect port" message on non-adhocmatching games, is because it's only shown on adhocmatchng games, it won't be shown on non-adhocmatchin games even when they had this issue too.
It's not like i didn't want to show it, it's because non-adhocmatching games are using custom port, so i don't know what are the correct port suppose to be (without customizing it for each games), thus unable to report it as "incorrect" without knowing the correct one.