Comment 5 for bug 1802628

I can confirm that this issue still exists in Focal:

# apt info winbind
Package: winbind
Version: 2:4.11.6+dfsg-0ubuntu1.1

$ nmblookup server-without-vbox
192.168.x.y server-without-vbox<00>

$ ping -c 1 server-without-vbox
PING server-without-vbox(192.168.x.y) 56(84) bytes of data.
64 bytes from 192.168.x.y (192.168.x.y): icmp_seq=1 ttl=64 time=0.612 m

$ nmblookup desktop-with-vbox
192.168.x.z desktop-with-vbox<00>
192.168.8.1 desktop-with-vbox<00>

$ ping desktop-with-vbox
ping: desktop-with-vbox: System error