I just use the bsdsocket.library for the network "interface" on my virtual Amiga, so I'm not entirely sure what you're doing Amiga side.
However, Wireshark comes with an older versin of Npcap, so what if you use the latest Npcap 1.31 available from here:
https://nmap.org/npcap/
I'm not suggesting it will fix your problem, but it's probably a good place to start.