Hello,
This seems like an adapter priority thing.
Could you please try to reorder your Dell Gigabit Ethernet adapter so its index is higher than your wireless LAN adapter?
Here is how:
https://superuser.com/questions/7087.../709231#709231
By default, Windows prefers wired adapters. The DisplayLink driver/installer doesn't change anything in the network stack, it simply adds a USB ethernet adapter. The heavy lifting in on the graphics part.
Kind regards,
Alban